these 3 derivations will be built:
  /nix/store/27zvwsbr4l1lsdp1dib0rdab2qixkxvc-clan-core-flake.drv
  /nix/store/r8rg8aacyyd6f6kv91n6fvknipisaij5-clan-cli-source.drv
  /nix/store/5fs5sjg22j6lgyc200z375lv91kfbpq9-clan-pytest-with-core.drv
building '/nix/store/27zvwsbr4l1lsdp1dib0rdab2qixkxvc-clan-core-flake.drv' on 'ssh-ng://builder@build-x86-01.clan.lol'
building '/nix/store/27zvwsbr4l1lsdp1dib0rdab2qixkxvc-clan-core-flake.drv'
clan-core-flake> warning: you don't have Internet access; disabling some network-dependent features
clan-core-flake> warning: you don't have Internet access; disabling some network-dependent features
clan-core-flake> 
building '/nix/store/5fs5sjg22j6lgyc200z375lv91kfbpq9-clan-pytest-with-core.drv' on 'ssh-ng://builder@build-x86-01.clan.lol'
error: path '/nix/store/h00k54yz4cyxcjwy3790f6j1i3wah9ad-mes-crt1-0.27.1' is not valid
error: Cannot build '/nix/store/5fs5sjg22j6lgyc200z375lv91kfbpq9-clan-pytest-with-core.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hxczyxbxzq2abc93m9ls4b65bifrj4cq-clan-pytest-with-core