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* doc/stdenv: rewrite manual build procedure to be closer to an auto-build This is based on <https://jade.fyi/blog/building-nix-derivations-manually/> plus some more original research. The previous version of this section did not work for your choice of simple Haskell package, e.g. haskellPackages.hscolour, due to things like `compileBuildDriverPhase` and other custom phases that it does not address at all. It seems more correct to use genericBuild in development to harmonize it with what is actually done. I feel a little bit like I am committing a sin by suggesting using the experimental CLI in the manual (afaict I am the first to do this), but I have given the old version of the command, and there are justifiable reasons to do it: * The noted limitations with env-vars are fixed. The one with the non-empty temp directory was one I ran into myself and oh boy was that not fun to debug. * Additionally the outputs are set *before* sourcing `setup.sh`: there is an issue with nix-shell where the original version of `$out` winds up in `NIX_LDFLAGS` due to _addRpathPrefix, which means that resulting executables may not run properly. It is sad that `nix develop` propagates a wrong value of `SHELL` to builders, though. It is equally sad that `nix-shell` is essentially abandoned upstream, with undocumented and not insignificant differences from `nix develop`. For the exact script differences: |
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| .. | ||
| cross-compilation.chapter.md | ||
| meta.chapter.md | ||
| multiple-output.chapter.md | ||
| platform-notes.chapter.md | ||
| stdenv.chapter.md | ||