SCons: Add explicit dependencies on thirdparty code in cloned env

Since we clone the environments to build thirdparty code, we don't get an
explicit dependency on the build objects produced by that environment.

So when we update thirdparty code, Godot code using it is not necessarily
rebuilt (I think it is for changed headers, but not for changed .c/.cpp files),
which can lead to an invalid compilation output (linking old Godot .o files
with a newer, potentially ABI breaking version of thirdparty code).

This was only seen as really problematic with bullet updates (leading to
crashes when rebuilding Godot after a bullet update without cleaning .o files),
but it's safer to fix it everywhere, even if it's a LOT of hacky boilerplate.

33 files changed, 486 insertions, 122 deletions

diff --git a/modules/assimp/SCsub b/modules/assimp/SCsub
index f1d0c742b4..7213efb74d 100644
--- a/modules/assimp/SCsub
+++ b/modules/assimp/SCsub
@@ -5,8 +5,13 @@ Import("env_modules")
 
 env_assimp = env_modules.Clone()
 
+# Thirdparty source files
+
+thirdparty_obj = []
+
 # Force bundled version for now, there's no released version of Assimp with
 # support for ArmaturePopulate which we use from their master branch.
+
 if True:  # env['builtin_assimp']:
     thirdparty_dir = "#thirdparty/assimp"
 
@@ -84,11 +89,20 @@ if True:  # env['builtin_assimp']:
 
     env_thirdparty = env_assimp.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, Glob("#thirdparty/assimp/code/CApi/*.cpp"))
-    env_thirdparty.add_source_files(env.modules_sources, Glob("#thirdparty/assimp/code/Common/*.cpp"))
-    env_thirdparty.add_source_files(env.modules_sources, Glob("#thirdparty/assimp/code/PostProcessing/*.cpp"))
-    env_thirdparty.add_source_files(env.modules_sources, Glob("#thirdparty/assimp/code/Material/*.cpp"))
-    env_thirdparty.add_source_files(env.modules_sources, Glob("#thirdparty/assimp/code/FBX/*.cpp"))
-
-# Godot's own source files
-env_assimp.add_source_files(env.modules_sources, "*.cpp")
+    env_thirdparty.add_source_files(thirdparty_obj, Glob("#thirdparty/assimp/code/CApi/*.cpp"))
+    env_thirdparty.add_source_files(thirdparty_obj, Glob("#thirdparty/assimp/code/Common/*.cpp"))
+    env_thirdparty.add_source_files(thirdparty_obj, Glob("#thirdparty/assimp/code/PostProcessing/*.cpp"))
+    env_thirdparty.add_source_files(thirdparty_obj, Glob("#thirdparty/assimp/code/Material/*.cpp"))
+    env_thirdparty.add_source_files(thirdparty_obj, Glob("#thirdparty/assimp/code/FBX/*.cpp"))
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_assimp.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/basis_universal/SCsub b/modules/basis_universal/SCsub
index dc7b176d24..351628a0e3 100644
--- a/modules/basis_universal/SCsub
+++ b/modules/basis_universal/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_basisu = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 # Not unbundled so far since not widespread as shared library
 thirdparty_dir = "#thirdparty/basis_universal/"
 tool_sources = [
@@ -41,8 +44,16 @@ if env["target"] == "debug":
 env_thirdparty = env_basisu.Clone()
 env_thirdparty.disable_warnings()
 if env["tools"]:
-    env_thirdparty.add_source_files(env.modules_sources, tool_sources)
-env_thirdparty.add_source_files(env.modules_sources, transcoder_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, tool_sources)
+env_thirdparty.add_source_files(thirdparty_obj, transcoder_sources)
+env.modules_sources += thirdparty_obj
 
 # Godot source files
-env_basisu.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_basisu.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/bullet/SCsub b/modules/bullet/SCsub
index 21bdcca18e..bfac0df5b0 100644
--- a/modules/bullet/SCsub
+++ b/modules/bullet/SCsub
@@ -7,6 +7,8 @@ env_bullet = env_modules.Clone()
 
 # Thirdparty source files
 
+thirdparty_obj = []
+
 if env["builtin_bullet"]:
     # Build only version 2 for now (as of 2.89)
     # Sync file list with relevant upstream CMakeLists.txt for each folder.
@@ -208,8 +210,16 @@ if env["builtin_bullet"]:
 
     env_thirdparty = env_bullet.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
 
 
 # Godot source files
-env_bullet.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_bullet.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/cvtt/SCsub b/modules/cvtt/SCsub
index 5438f7ebac..e56177d6e9 100644
--- a/modules/cvtt/SCsub
+++ b/modules/cvtt/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_cvtt = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/cvtt/"
 thirdparty_sources = [
     "ConvectionKernels.cpp",
@@ -17,7 +20,15 @@ env_cvtt.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_cvtt.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
 
 # Godot source files
-env_cvtt.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_cvtt.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/denoise/SCsub b/modules/denoise/SCsub
index bf3bd7d073..97feea2b44 100644
--- a/modules/denoise/SCsub
+++ b/modules/denoise/SCsub
@@ -8,6 +8,9 @@ Import("env_modules")
 env_oidn = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/oidn/"
 thirdparty_sources = [
     "core/api.cpp",
@@ -106,7 +109,8 @@ env_oidn.Append(
 
 env_thirdparty = env_oidn.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
 
 weights_in_path = thirdparty_dir + "weights/rtlightmap_hdr.tza"
 weights_out_path = thirdparty_dir + "weights/rtlightmap_hdr.gen.cpp"
@@ -114,5 +118,12 @@ weights_out_path = thirdparty_dir + "weights/rtlightmap_hdr.gen.cpp"
 env_thirdparty.Depends(weights_out_path, weights_in_path)
 env_thirdparty.CommandNoCache(weights_out_path, weights_in_path, resource_to_cpp.tza_to_cpp)
 
-env_oidn.add_source_files(env.modules_sources, "denoise_wrapper.cpp")
-env_modules.add_source_files(env.modules_sources, ["register_types.cpp", "lightmap_denoiser.cpp"])
+# Godot source files
+
+module_obj = []
+
+env_oidn.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/enet/SCsub b/modules/enet/SCsub
index c8f4b3885e..580e5a3eb0 100644
--- a/modules/enet/SCsub
+++ b/modules/enet/SCsub
@@ -7,6 +7,8 @@ env_enet = env_modules.Clone()
 
 # Thirdparty source files
 
+thirdparty_obj = []
+
 if env["builtin_enet"]:
     thirdparty_dir = "#thirdparty/enet/"
     thirdparty_sources = [
@@ -26,6 +28,16 @@ if env["builtin_enet"]:
 
     env_thirdparty = env_enet.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_enet.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-env_enet.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/etc/SCsub b/modules/etc/SCsub
index 383bbf83c3..9b46f17916 100644
--- a/modules/etc/SCsub
+++ b/modules/etc/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_etc = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 # Not unbundled so far since not widespread as shared library
 thirdparty_dir = "#thirdparty/etc2comp/"
 thirdparty_sources = [
@@ -31,7 +34,15 @@ env_etc.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_etc.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
 
 # Godot source files
-env_etc.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_etc.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/freetype/SCsub b/modules/freetype/SCsub
index bfc1658bb4..fc2535a6ca 100644
--- a/modules/freetype/SCsub
+++ b/modules/freetype/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_freetype = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_freetype"]:
     thirdparty_dir = "#thirdparty/freetype/"
     thirdparty_sources = [
@@ -84,6 +87,7 @@ if env["builtin_freetype"]:
     env_thirdparty = env_freetype.Clone()
     env_thirdparty.disable_warnings()
     lib = env_thirdparty.add_library("freetype_builtin", thirdparty_sources)
+    thirdparty_obj += lib
 
     # Needs to be appended to arrive after libscene in the linker call,
     # but we don't want it to arrive *after* system libs, so manual hack
@@ -98,5 +102,13 @@ if env["builtin_freetype"]:
     if not inserted:
         env.Append(LIBS=[lib])
 
+
 # Godot source files
-env_freetype.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_freetype.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/gdnavigation/SCsub b/modules/gdnavigation/SCsub
index 877d601c6a..22b5509b32 100644
--- a/modules/gdnavigation/SCsub
+++ b/modules/gdnavigation/SCsub
@@ -5,6 +5,10 @@ Import("env_modules")
 
 env_navigation = env_modules.Clone()
 
+# Thirdparty source files
+
+thirdparty_obj = []
+
 # Recast Thirdparty source files
 if env["builtin_recast"]:
     thirdparty_dir = "#thirdparty/recastnavigation/Recast/"
@@ -23,28 +27,37 @@ if env["builtin_recast"]:
     ]
     thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
 
-    env_navigation.Prepend(CPPPATH=[thirdparty_dir + "/Include"])
+    env_navigation.Prepend(CPPPATH=[thirdparty_dir + "Include"])
 
     env_thirdparty = env_navigation.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
-
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
 
 # RVO Thirdparty source files
 if env["builtin_rvo2"]:
-    thirdparty_dir = "#thirdparty/rvo2"
+    thirdparty_dir = "#thirdparty/rvo2/"
     thirdparty_sources = [
-        "/src/Agent.cpp",
-        "/src/KdTree.cpp",
+        "Agent.cpp",
+        "KdTree.cpp",
     ]
     thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
 
-    env_navigation.Prepend(CPPPATH=[thirdparty_dir + "/src"])
+    env_navigation.Prepend(CPPPATH=[thirdparty_dir])
 
     env_thirdparty = env_navigation.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+
+
+env.modules_sources += thirdparty_obj
 
 
 # Godot source files
-env_navigation.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_navigation.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/glslang/SCsub b/modules/glslang/SCsub
index 58c033c75d..182272ffc7 100644
--- a/modules/glslang/SCsub
+++ b/modules/glslang/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_glslang = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_glslang"]:
     thirdparty_dir = "#thirdparty/glslang/"
     thirdparty_sources = [
@@ -70,7 +73,16 @@ if env["builtin_glslang"]:
 
     env_thirdparty = env_glslang.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_glslang.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_glslang.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/jpg/SCsub b/modules/jpg/SCsub
index 8ee8e6dd6e..7c6ceeea29 100644
--- a/modules/jpg/SCsub
+++ b/modules/jpg/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_jpg = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 # Not unbundled for now as they are not commonly available as shared library
 thirdparty_dir = "#thirdparty/jpeg-compressor/"
 thirdparty_sources = [
@@ -17,7 +20,15 @@ env_jpg.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_jpg.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_jpg.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_jpg.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/mbedtls/SCsub b/modules/mbedtls/SCsub
index 3b1739c6ee..4fcbe8fb43 100755
--- a/modules/mbedtls/SCsub
+++ b/modules/mbedtls/SCsub
@@ -5,8 +5,11 @@ Import("env_modules")
 
 env_mbed_tls = env_modules.Clone()
 
+# Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_mbedtls"]:
-    # Thirdparty source files
     thirdparty_sources = [
         "aes.c",
         "aesni.c",
@@ -96,11 +99,21 @@ if env["builtin_mbedtls"]:
 
     env_thirdparty = env_mbed_tls.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
 
-# Module sources
-env_mbed_tls.add_source_files(env.modules_sources, "*.cpp")
+module_obj = []
+
+env_mbed_tls.add_source_files(module_obj, "*.cpp")
 
 if env["tests"]:
     env_mbed_tls.Append(CPPDEFINES=["TESTS_ENABLED"])
-    env_mbed_tls.add_source_files(env.modules_sources, "./tests/*.cpp")
+    env_mbed_tls.add_source_files(module_obj, "./tests/*.cpp")
+
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/meshoptimizer/SCsub b/modules/meshoptimizer/SCsub
index 3b1a5f917e..3f86bb4f00 100644
--- a/modules/meshoptimizer/SCsub
+++ b/modules/meshoptimizer/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_meshoptimizer = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/meshoptimizer/"
 thirdparty_sources = [
     "allocator.cpp",
@@ -26,9 +29,17 @@ thirdparty_sources = [
 ]
 thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
 
-
 env_thirdparty = env_meshoptimizer.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_meshoptimizer.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-env_modules.add_source_files(env.modules_sources, ["register_types.cpp"])
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/ogg/SCsub b/modules/ogg/SCsub
index e768fb4ae8..e415d92498 100644
--- a/modules/ogg/SCsub
+++ b/modules/ogg/SCsub
@@ -9,6 +9,9 @@ Import("env_modules")
 env_ogg = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_libogg"]:
     thirdparty_dir = "#thirdparty/libogg/"
     thirdparty_sources = [
@@ -21,7 +24,16 @@ if env["builtin_libogg"]:
 
     env_thirdparty = env_ogg.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_ogg.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_ogg.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/opensimplex/SCsub b/modules/opensimplex/SCsub
index 52d8b145ef..86d77c3dfb 100644
--- a/modules/opensimplex/SCsub
+++ b/modules/opensimplex/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_opensimplex = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/misc/"
 thirdparty_sources = [
     "open-simplex-noise.c",
@@ -16,7 +19,15 @@ env_opensimplex.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_opensimplex.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_opensimplex.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_opensimplex.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/opus/SCsub b/modules/opus/SCsub
index 52c61fa708..1437cd86df 100644
--- a/modules/opus/SCsub
+++ b/modules/opus/SCsub
@@ -10,6 +10,10 @@ Import("env_modules")
 env_opus = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
+# Thirdparty source files
 if env["builtin_opus"]:
     thirdparty_dir = "#thirdparty/opus/"
 
@@ -233,7 +237,16 @@ if env["builtin_opus"]:
 
     env_thirdparty = env_opus.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_opus.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Module files
-env_opus.add_source_files(env.modules_sources, "register_types.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/pvr/SCsub b/modules/pvr/SCsub
index e0baf851f1..36052cffed 100644
--- a/modules/pvr/SCsub
+++ b/modules/pvr/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_pvr = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 # Not unbundled so far since not widespread as shared library
 thirdparty_dir = "#thirdparty/pvrtccompressor/"
 thirdparty_sources = [
@@ -21,7 +24,15 @@ env_pvr.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_pvr.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
 
 # Godot source files
-env_pvr.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_pvr.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/regex/SCsub b/modules/regex/SCsub
index 2afacc1d9c..deb9db7591 100644
--- a/modules/regex/SCsub
+++ b/modules/regex/SCsub
@@ -5,6 +5,10 @@ Import("env_modules")
 
 env_regex = env_modules.Clone()
 
+# Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_pcre2"]:
     thirdparty_dir = "#thirdparty/pcre2/src/"
     thirdparty_flags = ["PCRE2_STATIC", "HAVE_CONFIG_H", "SUPPORT_UNICODE"]
@@ -52,11 +56,21 @@ if env["builtin_pcre2"]:
         env_pcre2 = env_regex.Clone()
         env_pcre2.disable_warnings()
         env_pcre2["OBJSUFFIX"] = "_" + width + env_pcre2["OBJSUFFIX"]
-        env_pcre2.add_source_files(env.modules_sources, thirdparty_sources)
         env_pcre2.Append(CPPDEFINES=[("PCRE2_CODE_UNIT_WIDTH", width)])
+        env_pcre2.add_source_files(thirdparty_obj, thirdparty_sources)
+        env.modules_sources += thirdparty_obj
 
     pcre2_builtin("16")
     pcre2_builtin("32")
 
+
+# Godot source files
+
+module_obj = []
+
 env_regex.Append(CPPDEFINES=[("PCRE2_CODE_UNIT_WIDTH", 0)])
-env_regex.add_source_files(env.modules_sources, "*.cpp")
+env_regex.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/squish/SCsub b/modules/squish/SCsub
index b31032403f..c9e29911d8 100644
--- a/modules/squish/SCsub
+++ b/modules/squish/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_squish = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_squish"]:
     thirdparty_dir = "#thirdparty/squish/"
     thirdparty_sources = [
@@ -26,7 +29,16 @@ if env["builtin_squish"]:
 
     env_thirdparty = env_squish.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_squish.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_squish.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/stb_vorbis/SCsub b/modules/stb_vorbis/SCsub
index 266c87c802..8fddb23dc8 100644
--- a/modules/stb_vorbis/SCsub
+++ b/modules/stb_vorbis/SCsub
@@ -6,11 +6,22 @@ Import("env_modules")
 env_stb_vorbis = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_sources = ["#thirdparty/misc/stb_vorbis.c"]
 
 env_thirdparty = env_stb_vorbis.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_stb_vorbis.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_stb_vorbis.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/svg/SCsub b/modules/svg/SCsub
index 0bfba34fe5..c7228a8d0b 100644
--- a/modules/svg/SCsub
+++ b/modules/svg/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_svg = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/nanosvg/"
 thirdparty_sources = [
     "nanosvg.cc",
@@ -16,7 +19,15 @@ env_svg.Prepend(CPPPATH=[thirdparty_dir])
 
 env_thirdparty = env_svg.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_svg.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_svg.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/text_server_adv/SCsub b/modules/text_server_adv/SCsub
index 7403b01a4c..3589c8546d 100644
--- a/modules/text_server_adv/SCsub
+++ b/modules/text_server_adv/SCsub
@@ -35,10 +35,14 @@ def make_icu_data(target, source, env):
     g.write("#endif")
 
 
+# Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_harfbuzz"]:
     env_harfbuzz = env_modules.Clone()
+    env_harfbuzz.disable_warnings()
 
-    # Thirdparty source files
     thirdparty_dir = "#thirdparty/harfbuzz/"
     thirdparty_sources = [
         "src/hb-aat-layout.cc",
@@ -107,6 +111,15 @@ if env["builtin_harfbuzz"]:
     ]
     thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
 
+    env_harfbuzz.Append(
+        CPPPATH=[
+            "#thirdparty/harfbuzz/src",
+            "#thirdparty/freetype/include",
+            "#thirdparty/graphite/include",
+            "#thirdparty/icu4c/common/",
+        ]
+    )
+
     if env["platform"] == "android" or env["platform"] == "linuxbsd" or env["platform"] == "server":
         env_harfbuzz.Append(CCFLAGS=["-DHAVE_PTHREAD"])
 
@@ -117,14 +130,6 @@ if env["builtin_harfbuzz"]:
             env_harfbuzz.Append(CCFLAGS=["-DHB_NO_MT"])
 
     env_harfbuzz.Append(
-        CPPPATH=[
-            "#thirdparty/harfbuzz/src",
-            "#thirdparty/freetype/include",
-            "#thirdparty/graphite/include",
-            "#thirdparty/icu4c/common/",
-        ]
-    )
-    env_harfbuzz.Append(
         CCFLAGS=[
             "-DHAVE_ICU_BUILTIN",
             "-DHAVE_ICU",
@@ -133,10 +138,9 @@ if env["builtin_harfbuzz"]:
             "-DGRAPHITE2_STATIC",
         ]
     )
-    env_harfbuzz.disable_warnings()
-    env_thirdparty = env_harfbuzz.Clone()
-    env_thirdparty.disable_warnings()
-    lib = env_thirdparty.add_library("harfbuzz_builtin", thirdparty_sources)
+
+    lib = env_harfbuzz.add_library("harfbuzz_builtin", thirdparty_sources)
+    thirdparty_obj += lib
 
     # Needs to be appended to arrive after libscene in the linker call,
     # but we don't want it to arrive *after* system libs, so manual hack
@@ -151,10 +155,11 @@ if env["builtin_harfbuzz"]:
     if not inserted:
         env.Append(LIBS=[lib])
 
+
 if env["builtin_graphite"]:
     env_graphite = env_modules.Clone()
+    env_graphite.disable_warnings()
 
-    # Thirdparty source files
     thirdparty_dir = "#thirdparty/graphite/"
     thirdparty_sources = [
         "src/gr_char_info.cpp",
@@ -203,10 +208,9 @@ if env["builtin_graphite"]:
             "-DGRAPHITE2_NFILEFACE",
         ]
     )
-    env_graphite.disable_warnings()
-    env_thirdparty = env_graphite.Clone()
-    env_thirdparty.disable_warnings()
-    lib = env_thirdparty.add_library("graphite_builtin", thirdparty_sources)
+
+    lib = env_graphite.add_library("graphite_builtin", thirdparty_sources)
+    thirdparty_obj += lib
 
     # Needs to be appended to arrive after libscene in the linker call,
     # but we don't want it to arrive *after* system libs, so manual hack
@@ -221,12 +225,12 @@ if env["builtin_graphite"]:
     if not inserted:
         env.Append(LIBS=[lib])
 
+
 if env["builtin_icu"]:
     env_icu = env_modules.Clone()
+    env_icu.disable_warnings()
 
-    # Thirdparty source files
     thirdparty_dir = "#thirdparty/icu4c/"
-    # Thirdparty source files
     thirdparty_sources = [
         "common/appendable.cpp",
         "common/bmpset.cpp",
@@ -457,10 +461,8 @@ if env["builtin_icu"]:
         ]
     )
 
-    env_icu.disable_warnings()
-    env_thirdparty = env_icu.Clone()
-    env_thirdparty.disable_warnings()
-    lib = env_thirdparty.add_library("icu_builtin", thirdparty_sources)
+    lib = env_icu.add_library("icu_builtin", thirdparty_sources)
+    thirdparty_obj += lib
 
     # Needs to be appended to arrive after libscene in the linker call,
     # but we don't want it to arrive *after* system libs, so manual hack
@@ -475,6 +477,11 @@ if env["builtin_icu"]:
     if not inserted:
         env.Append(LIBS=[lib])
 
+
+# Godot source files
+
+module_obj = []
+
 if env_text_server_adv["tools"]:
     env_text_server_adv.Append(CXXFLAGS=["-DICU_STATIC_DATA"])
 
@@ -486,4 +493,9 @@ env_text_server_adv.Append(
         "#thirdparty/icu4c/common/",
     ]
 )
-env_text_server_adv.add_source_files(env.modules_sources, "*.cpp")
+
+env_text_server_adv.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/text_server_fb/SCsub b/modules/text_server_fb/SCsub
index 7650e27063..03eccbe7bd 100644
--- a/modules/text_server_fb/SCsub
+++ b/modules/text_server_fb/SCsub
@@ -9,4 +9,5 @@ env_text_server_fb.Append(
         "#thirdparty/freetype/include",
     ]
 )
+
 env_text_server_fb.add_source_files(env.modules_sources, "*.cpp")
diff --git a/modules/theora/SCsub b/modules/theora/SCsub
index a01e65b4b0..6038ea086a 100644
--- a/modules/theora/SCsub
+++ b/modules/theora/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_theora = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_libtheora"]:
     thirdparty_dir = "#thirdparty/libtheora/"
     thirdparty_sources = [
@@ -80,7 +83,16 @@ if env["builtin_libtheora"]:
 
     env_thirdparty = env_theora.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_theora.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_theora.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/tinyexr/SCsub b/modules/tinyexr/SCsub
index 84b3b4015b..30bde96fb4 100644
--- a/modules/tinyexr/SCsub
+++ b/modules/tinyexr/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_tinyexr = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 # Not unbundled for now as they are not commonly available as shared library
 thirdparty_dir = "#thirdparty/tinyexr/"
 thirdparty_sources = [
@@ -20,7 +23,15 @@ env_tinyexr.Append(CPPDEFINES=["TINYEXR_USE_THREAD"])
 
 env_thirdparty = env_tinyexr.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_tinyexr.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Godot's own source files
-env_tinyexr.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/upnp/SCsub b/modules/upnp/SCsub
index 2e129e15ca..bc0b215be3 100644
--- a/modules/upnp/SCsub
+++ b/modules/upnp/SCsub
@@ -7,6 +7,8 @@ env_upnp = env_modules.Clone()
 
 # Thirdparty source files
 
+thirdparty_obj = []
+
 if env["builtin_miniupnpc"]:
     thirdparty_dir = "#thirdparty/miniupnpc/"
     thirdparty_sources = [
@@ -31,7 +33,16 @@ if env["builtin_miniupnpc"]:
 
     env_thirdparty = env_upnp.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_upnp.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_upnp.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/vhacd/SCsub b/modules/vhacd/SCsub
index ecd432b275..1ff4122114 100644
--- a/modules/vhacd/SCsub
+++ b/modules/vhacd/SCsub
@@ -7,6 +7,8 @@ env_vhacd = env_modules.Clone()
 
 # Thirdparty source files
 
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/vhacd/"
 
 thirdparty_sources = [
@@ -24,10 +26,19 @@ thirdparty_sources = [
 
 thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
 
-env_vhacd.Prepend(CPPPATH=[thirdparty_dir + "/inc"])
+env_vhacd.Prepend(CPPPATH=[thirdparty_dir + "inc"])
 
 env_thirdparty = env_vhacd.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
+
+# Godot source files
+
+module_obj = []
+
+env_vhacd.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-env_vhacd.add_source_files(env.modules_sources, "*.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/vorbis/SCsub b/modules/vorbis/SCsub
index 05d46757d3..bc31fff066 100644
--- a/modules/vorbis/SCsub
+++ b/modules/vorbis/SCsub
@@ -8,9 +8,10 @@ Import("env_modules")
 
 env_vorbis = env_modules.Clone()
 
-stub = True
-
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_libvorbis"]:
     thirdparty_dir = "#thirdparty/libvorbis/"
     thirdparty_sources = [
@@ -51,7 +52,16 @@ if env["builtin_libvorbis"]:
 
     env_thirdparty = env_vorbis.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_vorbis.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
 
-# Module files
-env_vorbis.add_source_files(env.modules_sources, "register_types.cpp")
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/webm/SCsub b/modules/webm/SCsub
index 247b4ead37..44e80e2870 100644
--- a/modules/webm/SCsub
+++ b/modules/webm/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_webm = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 thirdparty_dir = "#thirdparty/libsimplewebm/"
 thirdparty_sources = [
     "libwebm/mkvparser/mkvparser.cc",
@@ -31,7 +34,15 @@ if env["builtin_libvpx"]:
 
 env_thirdparty = env_webm.Clone()
 env_thirdparty.disable_warnings()
-env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+env.modules_sources += thirdparty_obj
 
 # Godot source files
-env_webm.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_webm.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/webp/SCsub b/modules/webp/SCsub
index 58f2bb35e6..4c0c2f7893 100644
--- a/modules/webp/SCsub
+++ b/modules/webp/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_webp = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_libwebp"]:
     thirdparty_dir = "#thirdparty/libwebp/"
     thirdparty_sources = [
@@ -130,7 +133,16 @@ if env["builtin_libwebp"]:
 
     env_thirdparty = env_webp.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_webp.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_webp.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/webrtc/SCsub b/modules/webrtc/SCsub
index 4f870ddb2f..31b8a73bf2 100644
--- a/modules/webrtc/SCsub
+++ b/modules/webrtc/SCsub
@@ -3,8 +3,6 @@
 Import("env")
 Import("env_modules")
 
-# Thirdparty source files
-
 env_webrtc = env_modules.Clone()
 use_gdnative = env_webrtc["module_gdnative_enabled"]
 
diff --git a/modules/websocket/SCsub b/modules/websocket/SCsub
index 13e51a39c0..4c022c43cf 100644
--- a/modules/websocket/SCsub
+++ b/modules/websocket/SCsub
@@ -5,28 +5,44 @@ Import("env_modules")
 
 env_ws = env_modules.Clone()
 
+thirdparty_obj = []
+
 if env["platform"] == "javascript":
     # Our JavaScript/C++ interface.
     env.AddJSLibraries(["library_godot_websocket.js"])
+
 elif env["builtin_wslay"]:
     # Thirdparty source files
-    wslay_dir = "#thirdparty/wslay/"
-    wslay_sources = [
+    thirdparty_dir = "#thirdparty/wslay/"
+    thirdparty_sources = [
         "wslay_net.c",
         "wslay_event.c",
         "wslay_queue.c",
         "wslay_stack.c",
         "wslay_frame.c",
     ]
-    wslay_sources = [wslay_dir + s for s in wslay_sources]
-    env_ws.Prepend(CPPPATH=[wslay_dir + "includes/"])
+    thirdparty_sources = [thirdparty_dir + s for s in thirdparty_sources]
+
+    env_ws.Prepend(CPPPATH=[thirdparty_dir + "includes/"])
     env_ws.Append(CPPDEFINES=["HAVE_CONFIG_H"])
+
     if env["platform"] == "windows" or env["platform"] == "uwp":
         env_ws.Append(CPPDEFINES=["HAVE_WINSOCK2_H"])
     else:
         env_ws.Append(CPPDEFINES=["HAVE_NETINET_IN_H"])
-    env_wslay = env_ws.Clone()
-    env_wslay.disable_warnings()
-    env_wslay.add_source_files(env.modules_sources, wslay_sources)
 
-env_ws.add_source_files(env.modules_sources, "*.cpp")
+    env_thirdparty = env_ws.Clone()
+    env_thirdparty.disable_warnings()
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_ws.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)
diff --git a/modules/xatlas_unwrap/SCsub b/modules/xatlas_unwrap/SCsub
index c659349d05..aa6bdaea33 100644
--- a/modules/xatlas_unwrap/SCsub
+++ b/modules/xatlas_unwrap/SCsub
@@ -6,6 +6,9 @@ Import("env_modules")
 env_xatlas_unwrap = env_modules.Clone()
 
 # Thirdparty source files
+
+thirdparty_obj = []
+
 if env["builtin_xatlas"]:
     thirdparty_dir = "#thirdparty/xatlas/"
     thirdparty_sources = [
@@ -17,7 +20,16 @@ if env["builtin_xatlas"]:
 
     env_thirdparty = env_xatlas_unwrap.Clone()
     env_thirdparty.disable_warnings()
-    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
 
 # Godot source files
-env_xatlas_unwrap.add_source_files(env.modules_sources, "*.cpp")
+
+module_obj = []
+
+env_xatlas_unwrap.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)