| 3 Jul 2025 |
 Teo (he/him) | In reply to @alexfmpe:matrix.org
I was profiling eval time of nixpkgs
how does one even do this? I always wondered
This is what I used https://github.com/NixOS/nix/pull/13220 | 20:30:51 |
 alexfmpe | Ooooh | 20:37:45 |
| 4 Jul 2025 |
 lxsameer | hey folks,do we support cabal 3.14 for development? | 15:16:38 |
| alexfmpe | not sure what "for development" means, does this answer it?
$ nix-build -A cabal-install
/nix/store/diig4i6ln0ia8xvv4kqs99klpjhlpzfl-cabal-install-3.14.2.0
| 15:38:44 |
| lxsameer | sorry for the confusion, apparently, cabal2nix does not like the cabal-version: 3.14 | 15:51:24 |
| lxsameer | in a cabal file | 15:51:28 |
 maralorn | That was I think fixed very recently on the haskell-updates. | 15:52:48 |
 ners | I found a package that has outdated dependency bounds. Trying to build it with doJailbreak , I would expect it to either succeed or fail at compile time, but:
Configuring OTP-0.1.0.0...
CallStack (from HasCallStack):
withMetadata, called at libraries/Cabal/Cabal/src/Distribution/Simple/Utils.hs:368:14 in Cabal-3.10.3.0-ab3d:Distribution.Simple.Utils
Error: Setup: Encountered missing or private dependencies:
base >=4.5.0.0 && <4.14,
bytestring >=0.9.2.0 && <0.11,
time >=1.4 && <1.10
| 16:40:27 |
| alexfmpe | cabal2nix doesn't handle conditionals properly (for now), and the deps are behind a if, so they don't survive the conversion to .nix | 17:01:15 |
| alexfmpe | https://hackage.haskell.org/package/OTP-0.1.0.0/src/OTP.cabal | 17:01:16 |
| alexfmpe | You can workaround by shoving them in with addBuildDepends | 17:01:41 |
| alexfmpe | You can see examples in the configuration-ghcjs-9.x and configuration-darwin files | 17:02:26 |
 Collin Arnett | How can I get the haddoc html files for dependencies of my project when using shellFor? I have doHaddoc turned on for my dependencies. | 18:35:27 |
| alexfmpe | It's on by default I think? | 19:35:28 |
| alexfmpe | Easiest way is to run hoogle locally | 19:35:41 |
| alexfmpe | hoogle server --local -p 8080 | 19:36:18 |
| alexfmpe | might need withHoogle = true, don't remember if default in shellFor | 19:36:48 |
| Collin Arnett | Does the hoogle server serve the haddocs as well? I'm not really sure what I'm looking for so I would like to browse the docs like I would on hackage. | 20:44:03 |
| Collin Arnett | Oh I see it does link them locally after you click on the package from hoogle. Thank you :D | 20:49:02 |
| 5 Jul 2025 |
| alexfmpe | is there a way for a nixpkgs-using project to apply an override to all haskell.packages.ghc123 like configuration-common.nix do?
or do we always need the nixpkgs.haskell.packages.${version} override cascade ? | 20:20:02 |
 sterni | alexfmpe: haskell.packageOverrides | 23:57:26 |
| sterni | which is the default argument for overrides passed to any specific package set, so you can't use that to further extend without doing that explicitly | 23:57:57 |
| 6 Jul 2025 |
| alexfmpe | ah damn actually this one time in particular I want the specific version thing | 00:05:26 |
| alexfmpe | because I'm messing with a boot package | 00:05:39 |
| alexfmpe | so using packageOverrides rebuilds the world | 00:05:54 |
 Alex | In reply to @alexfmpe:matrix.org
might need withHoogle = true, don't remember if default in shellFor Not default, unless it has changed recently. | 00:10:58 |
| alexfmpe | indeed | 00:12:02 |
| alexfmpe | https://github.com/NixOS/nixpkgs/blob/a697a033bd07502703b151797085e5c7b64c6f31/pkgs/development/haskell-modules/make-package-set.nix#L453 | 00:12:03 |
| Alex | In reply to @collinarnett:matrix.org
Does the hoogle server serve the haddocs as well? I'm not really sure what I'm looking for so I would like to browse the docs like I would on hackage. Note that how Hoogle serves Haddocks is affected by the --local flag.
(For most users, running with --local works better.)
See https://github.com/ndmitchell/hoogle/blob/e83646ee1b62eb724def6c838a34017b60fc519a/docs/Install.md#server | 00:14:08 |
 woobilicious | Is there anyway to "export" a build plan for haskell apps based on the nixpkgs version? trying to think how to compile my code for windows, and cabal obvious isn't going to pull in the exact same versions without some hints. I guess I could look at cross compiling using mingw64 version of ghc in nixpkgs, but that might just be a huge headache. | 05:56:37 |
