these 4 derivations will be built:
  /nix/store/faszv2cgzp9d9nmv1v18ayw300qqkxlw-closure-info.drv
  /nix/store/fa0j6maqrcq868fw0jb67ibwr8j75jxn-clan-cli-source.drv
  /nix/store/ijbp48grlkqa1pviy8i79sdwlw946vsd-clan-cli.drv
  /nix/store/cigc1mvcf15ngnwvgc7c0698fxq592j0-check-vars.drv
these 7 paths will be fetched (0.6 KiB download, 555.9 KiB unpacked):
  /nix/store/23c6izigzi772hc1l77m0y31g2ck06hk-nix-2.31.5-dev
  /nix/store/rbdqml2rgkj933q9hn4i73chrbr165cl-nix-expr-c-2.31.5
  /nix/store/v0w7kn423cs74dky78gssxi5s3w1np56-nix-expr-c-2.31.5-dev
  /nix/store/irgr9qxy7zdsih2zdanbn3kxii7i8y6f-nix-fetchers-c-2.31.5-dev
  /nix/store/hn4smlbnj5zj769swfshgba35dmn8blf-nix-flake-c-2.31.5
  /nix/store/x7x33pz7nyfj1i0z9xlgr3yfinc2bc8m-nix-flake-c-2.31.5-dev
  /nix/store/7z5hmc108qzch5ikb9xwlac6q676p90a-pypa-build-hook.sh
error: path '/nix/store/sr9jqpbq2g3pfkhk6p6bivzxx608rjwk-check-vars' is not valid
error: Cannot build '/nix/store/cigc1mvcf15ngnwvgc7c0698fxq592j0-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sr9jqpbq2g3pfkhk6p6bivzxx608rjwk-check-vars