diff --git a/nix/build-all.py b/nix/build-all.py
index 9fda4f9513..5727b23647 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -382,11 +382,13 @@ if MAC_CROSS_COMPILE_INTEL:
     MAC_CROSS_COMPILE_INTEL_BJAM_ARGS = ["architecture=x86"]
     MAC_CROSS_COMPILE_INTEL_CXX = "clang++ -arch x86_64"
     MAC_CROSS_COMPILE_INTEL_CC = "clang -arch x86_64"
+    MAC_CROSS_COMPILE_INTEL_AUTOCONF_HOST_ARGS = ["--host=x86_64-apple-darwin"]
 else:
     MAC_CROSS_COMPILE_INTEL_ARGS = []
     MAC_CROSS_COMPILE_INTEL_BJAM_ARGS = []
     MAC_CROSS_COMPILE_INTEL_CXX = ""
     MAC_CROSS_COMPILE_INTEL_CC = ""
+    MAC_CROSS_COMPILE_INTEL_AUTOCONF_HOST_ARGS = []
 
 OFF_ON = ["OFF", "ON"]
 BUILD_STATIC = "shared" not in flags
@@ -1195,7 +1197,9 @@ if "cgal" in targets:
     OLD_CC = None
     if MAC_CROSS_COMPILE_INTEL:
         OLD_CC = os.environ.get("CC")
+        # Otherwise it's using arm64 `gcc` and fails to build gmp.
         os.environ["CC"] = MAC_CROSS_COMPILE_INTEL_CC
+        gmp_args.extend(MAC_CROSS_COMPILE_INTEL_AUTOCONF_HOST_ARGS)
 
     build_dependency(
         name=f"gmp-{GMP_VERSION}",