nim: huge refactor of versioning by Eveeifyeve · Pull Request #461756 · NixOS/nixpkgs

Eveeifyeve · 2025-11-14T23:29:27Z

Deprecates nim1 and nim2 and respective unwrap packages packages and mainstreams one version of nim and respective unwrap which is upgraded to 2.2.8 and fixes nim pname issue in #485742.

Changelog: https://nim-lang.org/blog/2026/02/23/nim-228.html

Currently broken see: #461756 (comment)

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eclairevoyant · 2025-11-30T15:06:29Z

evaluation warning: warning: requiredNimVersion is deprecated and will be removed in a future release; please update your configuration.

The problem is you're unconditionally setting requiredNimVersion so this warning will always be present.

Upgrade: same with nimlsp nim was upgraded and removed this now defaults to nim which is currently 2.2.6 Broken: NixOS#461756 (comment) Upstream needs updating their nim versions for now, it will be marked broken

eclairevoyant · 2026-01-10T15:16:24Z

The nph commit fd109be is missing from the PR, as is e994a18.

eclairevoyant · 2026-01-12T04:17:12Z

Looks like mosdepth is broken

eclairevoyant

Again, not sure why it was moved in the first place.

Eveeifyeve · 2026-02-15T10:33:13Z

I can't seem to request a review from you, @eclairevoyant. I want you to review this as well.

daylinmorgan · 2026-02-23T14:34:11Z

FYI 2.2.8 was released: https://nim-lang.org/blog/2026/02/23/nim-228.html

Eveeifyeve · 2026-03-01T10:41:47Z

I am going to add this to the 26.05 issue as the aim should be, nim 1 and nim 2.0 versions to be deprecated by 26.05.

Eveeifyeve · 2026-03-04T06:47:49Z

FYI 2.2.8 was released: nim-lang.org/blog/2026/02/23/nim-228.html

Current active issue with this is it won't build due to:

CC: koch.nim
Hint:  [Link]
Hint: mm: orc; threads: on; opt: none (DEBUG BUILD, `-d:release` generates faster code)
70624 lines; 3.099s; 113.281MiB peakmem; proj: koch; out: /nix/var/nix/builds/nix-44862-3842090379/nim-2.2.8/koch [Succes
sX]
iteration: 1
bin/nim c  --skipUserCfg --skipParentCfg -d:nimKochBootstrap --nimcache:nimcache/r_macosx_arm64 --cpu:arm64 --os:MacOSX -
d:release -d:useGnuReadline -d:nativeStacktrace --parallelBuild:10 --noNimblePath --compileOnly compiler/nim.nim
Hint: used config file '/nix/var/nix/builds/nix-44862-3842090379/nim-2.2.8/config/nim.cfg' [Conf]
Hint: used config file '/nix/var/nix/builds/nix-44862-3842090379/nim-2.2.8/config/config.nims' [Conf]
Hint: used config file '/nix/var/nix/builds/nix-44862-3842090379/nim-2.2.8/compiler/nim.cfg' [Conf]
...............................
/nix/var/nix/builds/nix-44862-3842090379/nim-2.2.8/lib/system/excpt.nim(214, 14) Error: type mismatch
Expression: add(s, tempDlInfo.dli_fname)
  [1] s: string
  [2] tempDlInfo.dli_fname: cstring

Expected one of (first mismatch at [position]):
[1] proc add[T](s: var CellSeq[T]; c: T; t: PNimTypeV2)
[1] proc add[T](x: var seq[T]; y: openArray[T])
[1] proc add[T](x: var seq[T]; y: sink T)
[2] proc add(x: var string; y: char)
[2] proc add(x: var string; y: string)

UPDATE it's failing at the koch boot.

daylinmorgan · 2026-03-04T16:09:08Z

Building 2.2.8 with -d:release and -d:nativeStackTrace is causing this. This is still the case if you build the bootstrapped nim from source using sh build.sh (which we should be doing anyways, but that's unrelated).

I tested this in a container and ran into the same issue so it's not nix-specific.

Removing -d:nativeStackTrace would resolve the build issue (but I assume it was added for a reason).

the useGnuReadline and nativeStackTrace flags were seemingly added in 2017 and have stuck around, but I don't know if we need or should use either of them: 4e0a5e7

Eveeifyeve · 2026-03-05T18:10:56Z

Fuck, I just control alt deleted this by accident. I have a backup branch, I will rebase on to that branch.

daylinmorgan · 2026-03-05T18:17:24Z

I have this branch up to yesterday I think

daylinmorgan · 2026-03-05T18:20:36Z

@Eveeifyeve https://github.com/daylinmorgan/nixpkgs/tree/nim-refractor-1

nixpkgs-ci Bot added the 2.status: merge conflict This PR has merge conflicts with the target branch label Nov 18, 2025

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Tracking: Nim Programing Language #460877

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Eveeifyeve marked this pull request as ready for review November 30, 2025 09:49

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Manual backport: removal of nim 1 and migration to nim2. #466592

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eclairevoyant added 8.has: clean-up This PR removes packages or removes other cruft 6.topic: nim Nim programing language labels Nov 30, 2025

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nim: remove nim1 EOL #460946

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jopejoe1 mentioned this pull request Feb 6, 2026

[Tracking] Set pname and version for all packages exposed in packages.json #485742

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Tracking: fixed-point args for derivation builders #489490

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nim: huge refactor of packages #496960

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nim-unwrapped-2_2: Remove the invalid gimportc from patch #501273

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