Partial build log
this derivation will be built:
/nix/store/0f380sfsz4qa4pwfvb2z5z4g702w21c6-source.drv
building '/nix/store/51160lx91kh43fkl3wfrjp53wl0frxa4-source.drv'...
source> exporting https://github.com/dylan-lang/opendylan.git (rev cd9a8395586d33cc43a8611c1dc0513e69ee82dd) into /nix/store/x21rsw2yppww668wrxjdqcid3p4cxcc8-source
source> Initialized empty Git repository in /nix/store/x21rsw2yppww668wrxjdqcid3p4cxcc8-source/.git/
source> remote: Enumerating objects: 5933, done.
source> remote: Counting objects: 100% (5933/5933), done.
source> remote: Compressing objects: 100% (5085/5085), done.
source> remote: Total 5933 (delta 1191), reused 2287 (delta 633), pack-reused 0
source> Receiving objects: 100% (5933/5933), 10.00 MiB | 4.36 MiB/s, done.
source> Resolving deltas: 100% (1191/1191), done.
source> From https://github.com/dylan-lang/opendylan
source> * branch cd9a8395586d33cc43a8611c1dc0513e69ee82dd -> FETCH_HEAD
source> Switched to a new branch 'fetchgit'
source> Submodule 'documentation/sphinx-extensions' (git://github.com/dylan-lang/sphinx-extensions.git) registered for path 'documentation/sphinx-extensions'
source> Submodule 'sources/lib/collection-extensions' (git://github.com/dylan-lang/collection-extensions.git) registered for path 'sources/lib/collection-extensions'
source> Submodule 'sources/lib/command-line-parser' (git://github.com/dylan-lang/command-line-parser.git) registered for path 'sources/lib/command-line-parser'
source> Submodule 'sources/lib/hash-algorithms' (git://github.com/dylan-lang/hash-algorithms.git) registered for path 'sources/lib/hash-algorithms'
source> Submodule 'sources/lib/logging' (git://github.com/dylan-lang/logging.git) registered for path 'sources/lib/logging'
source> Submodule 'sources/lib/regular-expressions' (git://github.com/dylan-lang/regular-expressions.git) registered for path 'sources/lib/regular-expressions'
source> Submodule 'sources/lib/strings' (git://github.com/dylan-lang/strings.git) registered for path 'sources/lib/strings'
source> Submodule 'sources/qa/testworks' (git://github.com/dylan-lang/testworks.git) registered for path 'sources/qa/testworks'
source> Initialized empty Git repository in /nix/store/x21rsw2yppww668wrxjdqcid3p4cxcc8-source/documentation/sphinx-extensions/.git/
source> fatal: unable to connect to github.com:
source> github.com[0: 140.82.121.4]: errno=Connection timed out
source> fatal: unable to connect to github.com:
source> github.com[0: 140.82.121.3]: errno=Connection timed out
error: building of '/nix/store/51160lx91kh43fkl3wfrjp53wl0frxa4-source.drv!*' from .drv file timed out after 300 seconds
error: