these 2 derivations will be built:
  /nix/store/2sq41fgad007v8ivryh7ybpiavh9gfys-lean-ctx-3.10.2.drv
  /nix/store/lq0gyw9j3h7vd9prxddf3r4jhcp18v2x-check-lean-ctx.drv
error: timed out after 1200 seconds
error: Cannot build '/nix/store/lq0gyw9j3h7vd9prxddf3r4jhcp18v2x-check-lean-ctx.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/33qvqrkfjkcs1d3crll21y4wj4v6rffm-check-lean-ctx