these 4 derivations will be built:
  /nix/store/by06p4h2z5aghwka7clnp9n02y6mczq8-clan-cli-source.drv
  /nix/store/i67wfb2dfrfrxp3515vq2vlj02jn1fhz-clan-cli.drv
  /nix/store/r5hpl1fy1n4ivn51mkacx75hfzhmdfmk-closure-info.drv
  /nix/store/saicwbga7bchg1a188pxzr0033s4zk6g-check-vars.drv
error: path '/nix/store/d5dlcwi4bfcabbdnjcpqhq61yqwddbcs-check-vars' is not valid
error: Cannot build '/nix/store/saicwbga7bchg1a188pxzr0033s4zk6g-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/d5dlcwi4bfcabbdnjcpqhq61yqwddbcs-check-vars