diff --git a/nix/build-all.py b/nix/build-all.py
index 79b0a64932..bfe039d078 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -591,10 +591,6 @@ def run_cmake(arg1, cmake_args: "list[str]", cmake_dir: Union[str, None] = None,
             f"-DBUILD_SHARED_LIBS={OFF_ON[not BUILD_STATIC]}",
         )
 
-    module_flags = []
-    if "wasm" in flags:
-        module_flags.append(f"-DCMAKE_MODULE_LINKER_FLAGS={os.environ['LDFLAGS']}")
-
     run(
         [
             *wasm,
@@ -604,7 +600,6 @@ def run_cmake(arg1, cmake_args: "list[str]", cmake_dir: Union[str, None] = None,
             *cmake_args,
             f"-DCMAKE_BUILD_TYPE={BUILD_CFG}",
             f"-DCMAKE_SHARED_LINKER_FLAGS={os.environ['LDFLAGS']}",
-            *module_flags
         ],
         cwd=cwd,
     )
@@ -1399,9 +1394,9 @@ elif "occ" in targets:
     occ_library_dir = f"{DEPS_DIR}/install/oce-{OCE_VERSION}/lib"
     cmake_args.extend(["-DOCC_INCLUDE_DIR=" + occ_include_dir, "-DOCC_LIBRARY_DIR=" + occ_library_dir])
 
-# if "manifold" in targets:
-#     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/manifold-{MANIFOLD_VERSION}")
-#     cmake_args.append("-DWITH_MANIFOLD=On")
+if "manifold" in targets:
+     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/manifold-{MANIFOLD_VERSION}")
+     cmake_args.append("-DWITH_MANIFOLD=On")
 
 if "OpenCOLLADA" in targets:
     # pcre is a dependency of OpenCOLLADA, but since we `find_package`,
diff --git a/pyodide/meta.yaml b/pyodide/meta.yaml
index fd8e6b4102..7c6580d801 100644
--- a/pyodide/meta.yaml
+++ b/pyodide/meta.yaml
@@ -8,7 +8,7 @@ source:
 
 build:
   script: |
-    CFLAGS="-O0 -g" CXXFLAGS="-O0 -g" LDFLAGS="-O0 -g" IFCOS_SCHEMAS=4 BUILD_CFG=Debug python nix/build-all.py -v --wasm --py313
+    BUILD_CFG=Release python nix/build-all.py -v --wasm --py313
 
 about:
   home: http://ifcopenshell.org
diff --git a/src/ifcgeom/kernels/CMakeLists.txt b/src/ifcgeom/kernels/CMakeLists.txt
index 7794bd05f7..56b7ba6ef2 100644
--- a/src/ifcgeom/kernels/CMakeLists.txt
+++ b/src/ifcgeom/kernels/CMakeLists.txt
@@ -28,7 +28,7 @@ foreach(kernel ${GEOMETRY_KERNELS})
             ${KERNEL_TARGET}
             PRIVATE "SHELL:-s -s SIDE_MODULE=1"
         )
-    endif()    
+    endif()
 
     set_target_properties(${KERNEL_TARGET} PROPERTIES
         COMPILE_FLAGS "-DIFC_GEOMLIBRARY_EXPORTS"
@@ -69,7 +69,6 @@ foreach(kernel ${GEOMETRY_KERNELS})
             set(OCCT_LIBS_FILTERED ${OpenCASCADE_LIBRARIES})
             list(FILTER OCCT_LIBS_FILTERED EXCLUDE REGEX "(^|;)TKXMesh($|;)")
             target_link_libraries(${KERNEL_TARGET} PRIVATE ${OCCT_LIBS_FILTERED})
-		# message(FATAL_ERROR "OCCT_LIBS_FILTERED ${OCCT_LIBS_FILTERED}")
         else()
             target_link_libraries(${KERNEL_TARGET} PRIVATE ${OpenCASCADE_LIBRARIES})
         endif()