If it's an EMSCRIPTEN build, we're not done

nix/build-all.py

@@ -951,6 +951,9 @@ elif "occ" in targets:
 
 if "manifold" in targets:
     dependency_name = f"manifold-{MANIFOLD_VERSION}"
+    patches = []
+    if WASM:
+        patches.append("./patches/manifold/install-metadata-for-emscripten.patch")
     build_dependency(
         name=dependency_name,
         mode="cmake",
@@ -970,6 +973,7 @@ if "manifold" in targets:
         download_name="manifold",
         download_tool=download_tool_git,
         revision=f"v{MANIFOLD_VERSION}",
+        patch=patches,
     )
 
 if "libxml2" in targets:

nix/patches/manifold/install-metadata-for-emscripten.patch

@@ -0,0 +1,17 @@
+# This file was generated with the assistance of an AI coding tool.
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 42e403b..764562f 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -249,11 +249,6 @@ set_source_files_properties(
+   PROPERTIES GENERATED TRUE
+ )
+ 
+-# If it's an EMSCRIPTEN build, we're done
+-if(EMSCRIPTEN)
+-  return()
+-endif()
+-
+ # CMake exports
+ configure_file(
+   cmake/manifoldConfig.cmake.in