Fix nix env

Author: Pascal Hertleif

shell.nix

@@ -7,8 +7,13 @@ pkgs.mkShell {
     nodejs-12_x
     python37 # for node-gyp
     can-utils
+    clang
+    llvmPackages.libclang.lib
 
     # keep this line if you use bash
     pkgs.bashInteractive
   ];
+
+  # Needed so bindgen can find libclang.so
+  LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
 }