these 5 derivations will be built:
  /nix/store/i32w5lgw6asx92bwaz8x0phshqij9z43-clan-runtime.drv
  /nix/store/fdxbhmsandcjbv8vsc648iysy2djjpi9-clan-cli-source.drv
  /nix/store/6phpw6dbd0007y5ikv1hd14rhsgf3dyp-clan-cli.drv
  /nix/store/h08gd5gy5r3yshi26d42bmdykvfwhw8v-closure-info.drv
  /nix/store/afnhsl1kqbqgb47j7agxcxdbvmpxafj1-check-vars.drv
error: path '/nix/store/sgfvj0ysa14znhy9rxdp9zvmy2xkkh9z-check-vars' is not valid
error: Cannot build '/nix/store/afnhsl1kqbqgb47j7agxcxdbvmpxafj1-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sgfvj0ysa14znhy9rxdp9zvmy2xkkh9z-check-vars