these 2 derivations will be built:
  /nix/store/hxmdwkskvjfpwq0j1zw9mnn6jldx30b5-source.drv
  /nix/store/222i6n3ghhzyivh7ij62zkx2fjii67v6-nix-shell.drv
error: hash mismatch in fixed-output derivation '/nix/store/l985dvf9qycamcqr63x65i7768nmh4as-source.drv':
         specified: sha256-fcGVoV0Vd8TrYDE730W9GBHcVjTXB3oGqWzJRErBBzk=
            got:    sha256-uWORGGTafVZaTQV6a9ryETtYba0XKRpgti/WPJpIM6Q=
error: build of resolved derivation '/nix/store/l985dvf9qycamcqr63x65i7768nmh4as-source.drv' failed
error: Cannot build '/nix/store/222i6n3ghhzyivh7ij62zkx2fjii67v6-nix-shell.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/z7sldmfgs158lamzm8nh3dw82kjklv3y-nix-shell