diff --git a/flake.nix b/flake.nix
index 7f25436..44b1f03 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,8 +40,6 @@
 
             cargoTarget = nixpkgs.lib.strings.concatMapStringsSep "_" (nixpkgs.lib.strings.toUpper) systemMappings.${crossSystem};
 
-            ccTarget = nixpkgs.lib.strings.concatStringsSep "_" systemMappings.${crossSystem};
-
             toolchain = with fenix.packages.${system}; combine [
               minimal.cargo
               minimal.rustc
@@ -58,8 +56,8 @@
 
             CARGO_BUILD_TARGET = target;
             "CARGO_TARGET_${cargoTarget}_LINKER" = "${cc}/bin/${cc.targetPrefix}cc";
-            "CC_${ccTarget}" = "${cc}/bin/${cc.targetPrefix}cc";
-            "AR_${ccTarget}" = "${cc}/bin/${cc.targetPrefix}ar";
+            TARGET_CC = "${cc}/bin/${cc.targetPrefix}cc";
+            TARGET_AR = "${cc}/bin/${cc.targetPrefix}ar";
           });
       in
       {