diff --git a/nix/build-all.py b/nix/build-all.py
index 9c42d67e0d..fa6fbe0048 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -1150,15 +1150,9 @@ if schemas:
     cmake_args.append(f"-DSCHEMA_VERSIONS={schemas}")
 
 if "cgal" in targets:
-    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",
-        ]
-    )
+    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 "occ" in targets and USE_OCCT:
     cmake_args_prefix_path.append(f"{DEPS_DIR}/install/occt-{OCCT_VERSION}")