diff --git a/flake.lock b/flake.lock
index 7cbdab13..4ad5c10a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -85,11 +85,11 @@
     },
     "nixpkgs-unpatched": {
       "locked": {
-        "lastModified": 1688679045,
-        "narHash": "sha256-t3xGEfYIwhaLTPU8FLtN/pLPytNeDwbLI6a7XFFBlGo=",
+        "lastModified": 1688918189,
+        "narHash": "sha256-f8ZlJ67LgEUDnN7ZsAyd1/Fyby1VdOXWg4XY/irSGrQ=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3c7487575d9445185249a159046cc02ff364bff8",
+        "rev": "408c0e8c15a1c9cf5c3226931b6f283c9867c484",
         "type": "github"
       },
       "original": {
diff --git a/overlays/cross.nix b/overlays/cross.nix
index 5fe9edf3..e8fdde7a 100644
--- a/overlays/cross.nix
+++ b/overlays/cross.nix
@@ -1347,7 +1347,9 @@ in {
     nativeBuildInputs = orig.nativeBuildInputs ++ [ final.lua5 final.protobuf ];
     # fix that it can't find the c compiler
     # makeFlags = orig.makeFlags or [] ++ [ "CC=${prev.stdenv.cc.targetPrefix}cc" ];
-    BUILDCC = "${prev.stdenv.cc}/bin/${prev.stdenv.cc.targetPrefix}cc";
+    env = orig.env // {
+      BUILDCC = "${final.stdenv.cc}/bin/${final.stdenv.cc.targetPrefix}cc";
+    };
   });
   # fixes "perl: command not found"
   vpnc = mvToNativeInputs [ final.perl ] prev.vpnc;