these 3 derivations will be built:
  /nix/store/4zl7vd195knydmjxwfjbcqkx3wkfjj3w-lean-ctx-3.11.4-vendor.drv
  /nix/store/24rraxkck3sip5n8ckyl5nrak0fvyikr-lean-ctx-3.11.4.drv
  /nix/store/945kxsl072hp3169xg1a21fvqqj3nb8z-check-lean-ctx.drv
error: timed out after 1200 seconds
error: Cannot build '/nix/store/945kxsl072hp3169xg1a21fvqqj3nb8z-check-lean-ctx.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/chyhij4kkk0cv3lgfd7qbx1qyq7hl2s3-check-lean-ctx