NIXPKG1 http://releases.strategoxt.org/pgen-with-aterm64/pgen-2.8.1pre26912-nan3v3fv/MANIFEST pgen-2.8.1pre26912 x86_64-linux /nix/store/p4g2v22l77zcddhdp0nscqj912gx4760-pgen.drv /nix/store/w4qfwghwl4557kahqiqwasp432yygd9j-pgen