these 2 derivations will be built:
  /nix/store/n7yzcm3f98gxrc249d782rqq0f2a01sw-closure-info.drv
  /nix/store/whrv24xc6pw0hlgxpcbxjkplc9q7gd28-check-vars.drv
error: path '/nix/store/vkygj6wihf55879lc5s8n5f80qga8nxf-check-vars' is not valid
error: Cannot build '/nix/store/whrv24xc6pw0hlgxpcbxjkplc9q7gd28-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/vkygj6wihf55879lc5s8n5f80qga8nxf-check-vars