these 4 derivations will be built:
  /nix/store/2818r0l279pjjljw4nsggpvlnhd881qw-claude-code-2.1.308.drv
  /nix/store/29bjhfsqjvg7lzz5p7kxcg3087pcfa70-cursor-agent-2026.10.22-27dcf5f.drv
  /nix/store/a7i1112vmjl3yr426zqpq54w1kv661v0-t3code-0.1.1.drv
  /nix/store/8vcfhm0h1bqq8mqp6v7wi7n56a0nqh26-check-t3code.drv
could not copy /nix/store/xmdzqlp8vikr01p17k2qj0nz5n3g4hff-claude-code-2.1.308: error: gRPC FetchNars failed: failed to connect to all addresses; last error: UNKNOWN: ipv6:%5B2a01:4f9:3071:1fc8::1%5D:50051: handshaker shutdown
error: some outputs are unexpectedly invalid