diff --git a/nix/build-all.py b/nix/build-all.py
index 65c21455e0..0ec1cb6c15 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -1252,6 +1252,14 @@ if "cgal" in targets:
     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/cgal-{CGAL_VERSION}")
     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/gmp-{GMP_VERSION}")
     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/mpfr-{MPFR_VERSION}")
+    if "wasm" in flags:
+        cmake_args.extend([
+            f"-DCGAL_INCLUDE_DIR={DEPS_DIR}/install/cgal-{CGAL_VERSION}/include",
+            f"-DGMP_INCLUDE_DIR={DEPS_DIR}/install/gmp-{GMP_VERSION}/include",
+            f"-DGMP_LIBRARY_DIR={DEPS_DIR}/install/gmp-{GMP_VERSION}/lib",
+            f"-DMPFR_INCLUDE_DIR={DEPS_DIR}/install/mpfr-{MPFR_VERSION}/include",
+            f"-DMPFR_LIBRARY_DIR={DEPS_DIR}/install/mpfr-{MPFR_VERSION}/lib",
+        ])
 
 if "occ" in targets and USE_OCCT:
     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/occt-{OCCT_VERSION}")