NixOS/nix

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Nix, the purely functional package manager

Stars: 17.7k
Forks: 2k
Open beginner issues: 15
Indexed issues: 2.4k
Avg merge: 1d 16h
Merged PRs (30d): 80

Dominant language: C++
License: LGPL-2.1
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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2,433 open issues indexed

outputChecks: symbolic sibling-output references fail to resolve when the sibling was already valid Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

NixOS/nix#16485 · Opened Sep 18, 2026
Preview and organize changes before downloading Open

feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

NixOS/nix#16484 · 1 comment · Opened Sep 18, 2026
[local-store] SQLite error when executing operations on read-only local store Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 78/100

NixOS/nix#16475 · 1 comment · Opened Sep 16, 2026
Hook or Cuckoo Filter for Nix Store via Nix Daemon Protocol Open

feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

NixOS/nix#16468 · 1 comment · Opened Sep 14, 2026
`builtins.fetchTarball` fails with a large archive when url starts with `file://` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16463 · 2 comments · Opened Sep 12, 2026
`nix profile add` conflict message has new/old packages backwards Open

bug error-messages

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

NixOS/nix#16448 · Opened Sep 10, 2026
macOS installer breaks an existing nix-installer volume, spins forever, and mishandles a root-only synthetic.conf Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

NixOS/nix#16447 · Opened Sep 10, 2026
Remote building over ssh can cause hangs on lots of output, `ssh-ng://` seems fine Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

NixOS/nix#16437 · 1 comment · Opened Sep 7, 2026
`--override-input` + local registry forbids updates of other inputs Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

NixOS/nix#16434 · Opened Sep 7, 2026
Very misleading `--override-input` and `--no-write-lock-file` help message Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

NixOS/nix#16426 · 1 comment · Opened Sep 4, 2026
Updated submodules are ignored unless committed Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

NixOS/nix#16424 · 1 comment · 1 reaction · Opened Sep 4, 2026
nix: offline detection is a dead branch on Windows (`haveInternet` always returns true) Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NixOS/nix#16416 · Opened Sep 2, 2026
libutil: the retry after a failed `rename` in `replaceSymlink` is unreachable on POSIX, and would leak on Windows Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NixOS/nix#16415 · Opened Sep 2, 2026
Windows: no way to express an absolute path; the accepted form is drive-relative Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NixOS/nix#16412 · Opened Sep 1, 2026
Assertion 'maybeOutputPath' failed in void main_nix_build Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NixOS/nix#16389 · Opened Aug 29, 2026
overriding a non-flake input with a subdirectory of a git repository does not work Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

NixOS/nix#16388 · Opened Aug 29, 2026
`:e` in `nix repl` can be incompatible with `--pure-eval` without saying so Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16385 · 4 comments · Opened Aug 28, 2026
Windows: getFSSourceAccessor() passes "/" as the accessor root, which is not absolute on Windows, so any evaluation aborts Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NixOS/nix#16365 · 2 comments · Opened Aug 26, 2026
A non-absolute SSL_CERT_FILE aborts nix during static initialization (and silently kills the Windows test suites) Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

NixOS/nix#16363 · Opened Aug 25, 2026
Windows symlink skips blame Wine, but std::filesystem on MinGW is the cause (and misreports symlinks silently) Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16361 · 3 comments · Opened Aug 25, 2026
Windows CI is non-blocking and covers one of five unit-test suites Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

NixOS/nix#16360 · 6 comments · Opened Aug 25, 2026
Windows: RestoreSink::createDirectory never sets dirFd, so NAR extraction aborts on the first nested directory Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

NixOS/nix#16358 · 2 comments · Opened Aug 25, 2026
Windows CI cannot report static-initialisation faults Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16356 · 3 comments · Opened Aug 25, 2026
Symlink permissions aren't canonicalised on BSDs and Darwin Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16348 · 1 comment · 1 reaction · Opened Aug 21, 2026
Ugly rendering of `nix --help` when locale set to "C" Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

NixOS/nix#16334 · Opened Aug 20, 2026
Autocomplete for `nix profile` Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16329 · Opened Aug 19, 2026
Diagnostic derivation output store path that survives build failure Open

derivation-build feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

NixOS/nix#16322 · Opened Aug 18, 2026
Not able to download the nixpkg into my vm Open

installer

Difficulty 3/5 1-2 days Newbie friendliness 38/100

NixOS/nix#16315 · Opened Aug 17, 2026
`nix repl` cannot bind a variable to an expression containing multi-line attribute set Open

bug repl

Difficulty 3/5 1-2 days Newbie friendliness 58/100

NixOS/nix#16310 · 1 reaction · Opened Aug 16, 2026
nix-shell fails to realise a derivation's source inputs when they exist only in the `eval-store` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16297 · Opened Aug 13, 2026
Output of `nix flake metadata` to reflect value of inputs' `flake` attribute Open

feature

Difficulty 3/5 1-2 days Newbie friendliness 64/100

NixOS/nix#16290 · Opened Aug 12, 2026
Support builtins.getFlake to accept an attrset Open

feature

Difficulty 5/5 Over a week Newbie friendliness 45/100

NixOS/nix#16289 · 2 comments · 17 reactions · Opened Aug 12, 2026
Build logs are never deleted Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16283 · 1 comment · 1 reaction · Opened Aug 10, 2026
`nix formatter build` incorrectly accepts `--file` and `--expr` arguments Open

bug cli flakes new-cli

Difficulty 3/5 1-2 days Newbie friendliness 42/100

NixOS/nix#16281 · 2 comments · Opened Aug 9, 2026
gc-non-blocking.sh test is flaky with sanitizers Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

NixOS/nix#16277 · 1 comment · Opened Aug 9, 2026
`nix copy` does not copy when file disappeared on destination Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16273 · 3 comments · Opened Aug 8, 2026
local-overlay store: GC frees nothing under --max-freed, on an uninitialised `bytesFreed` Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

NixOS/nix#16269 · Opened Aug 6, 2026
abort: bit out of range 0 - FD_SETSIZE on fd_set Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NixOS/nix#16258 · 2 comments · Opened Aug 3, 2026
String interpolation shows up as "path segment" in trace Open

bug error-messages language

Difficulty 3/5 1-2 days Newbie friendliness 63/100

NixOS/nix#16253 · Opened Aug 2, 2026
Hardening derivation handling Open

NixOS/nix#16237 · 2 comments · 1 reaction · 2 assignees · Opened Jul 29, 2026
`DerivationView`: avoid copying when varying derivation inputs Open

NixOS/nix#16236 · 1 assignee · Opened Jul 29, 2026
Flake Git inputs specifying only a `rev` always add/lock to the default `ref` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16233 · Opened Jul 29, 2026
No fast, painfree way to add local file to store and get hash. Open

feature

Difficulty 3/5 1-2 days Newbie friendliness 55/100

NixOS/nix#16232 · Opened Jul 29, 2026
Download progress bar for nix-shell Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NixOS/nix#16231 · 3 comments · 1 reaction · Opened Jul 29, 2026
`nix registry pin` cannot handle a flake type change Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NixOS/nix#16221 · Opened Jul 27, 2026
`path:/abs` cuts out parent, while `path:./rel` does not Open

bug flakes

Difficulty 5/5 Over a week Newbie friendliness 35/100

NixOS/nix#16214 · Opened Jul 25, 2026
Shallow fetching error in 2.35 Open

bug

NixOS/nix#16212 · 1 reaction · 1 assignee · Opened Jul 25, 2026
Support for Game of Trees (got) work trees as flake inputs Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NixOS/nix#16211 · Opened Jul 25, 2026
Drop copies of `sourceInfo` attributes from flake "outputs" Open

feature flakes

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NixOS/nix#16210 · 1 reaction · Opened Jul 25, 2026
`nix profile` doesn't replace flake registries with the resolved flakeref Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NixOS/nix#16208 · Opened Jul 25, 2026

NixOS/nix

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