build: Fix AWS LC compilation errors by using clang for AWS_LC_FIPS_SYS_CC (#486)

Co-authored-by: asothii <[email protected]>

Author: 2 people

flake.nix

@@ -29,11 +29,14 @@
               glib
               openssl
               pkg-config
+              llvmPackages.clangUseLLVM
               (rust-bin.selectLatestNightlyWith (toolchain:
                 toolchain.default.override {
                   extensions = ["rust-src"];
                 }))
             ];
+            
+            AWS_LC_FIPS_SYS_CC = "${llvmPackages.clangUseLLVM}/bin/cc";
           };
         }
     );