these 4 derivations will be built:
  /nix/store/1cg6m0kzzydbh37h68wp3k3jr6cwpx4m-closure-info.drv
  /nix/store/6z8n4z5zdd4wc5n16byfp3hhcz2bm7fw-clan-cli-source.drv
  /nix/store/8ljpffp0dqcq54ak7j1v60by3k3kimmx-clan-cli.drv
  /nix/store/dpq8dq8wjfryc0207mc602f3mzd84rdl-check-vars.drv
error: path '/nix/store/cr8xfx8qbwc6lawfzbyi55ayihpkkmnx-check-vars' is not valid
error: Cannot build '/nix/store/dpq8dq8wjfryc0207mc602f3mzd84rdl-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/cr8xfx8qbwc6lawfzbyi55ayihpkkmnx-check-vars