these 4 derivations will be built:
  /nix/store/lgkyrlnyjsnb54aqfw9i3zf3rf60qljj-closure-info.drv
  /nix/store/chaqblq1rvrl8k4cay945139xsckzkj1-clan-cli-source.drv
  /nix/store/z7gxwf3f7lp585i4s2vmdlj2cca333sm-clan-cli.drv
  /nix/store/6mvdyaa3x0g07r247cnfa2kjvsqd31ci-check-vars.drv
error: path '/nix/store/94awfa61kq7fjf6cab1fjsb5apcc6n13-check-vars' is not valid
error: Cannot build '/nix/store/6mvdyaa3x0g07r247cnfa2kjvsqd31ci-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/94awfa61kq7fjf6cab1fjsb5apcc6n13-check-vars