these 2 derivations will be built:
  /nix/store/1180ivy6dacwvclbjq4v8jji0cffk49z-closure-info.drv
  /nix/store/8ys2w81ga9rljbsj0a2qkmapkz5b0k57-check-vars.drv
error: path '/nix/store/b7rrjbbryzkyziz47dlkw9k4107s8wak-check-vars' is not valid
error: Cannot build '/nix/store/8ys2w81ga9rljbsj0a2qkmapkz5b0k57-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/b7rrjbbryzkyziz47dlkw9k4107s8wak-check-vars