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docs: Explain setuptools-scm edge case

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Helps with #921.
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Victor Engmark 2023-01-09 09:11:37 +13:00
parent f40c15573d
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docs/edgecases.md
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@ -169,3 +169,26 @@ poetry2nix.mkPoetryApplication {
We recommend that you contribute your changes to `poetry2nix` so that other users can profit from them as well.
The specific file with the upstream overrides is [build-systems.json](https://github.com/nix-community/poetry2nix/blob/master/overrides/build-systems.json). It is a simple JSON file which contains the overrides in an array and sorted in alphabetical order.
#### ERROR: Could not find a version that satisfies the requirement [package spec] (from [package]) (from versions: none)
[Example error message](https://github.com/nix-community/poetry2nix/issues/921):
> ERROR: Could not find a version that satisfies the requirement python-ulid<2.0.0,>=1.1.0 (from linz-logger) (from versions: none)
> ERROR: No matching distribution found for python-ulid<2.0.0,>=1.1.0
[Quoting @adisbladis](https://github.com/nix-community/poetry2nix/issues/921#issuecomment-1373764661):
> This is usually because of setuptools-scm. I'd try adding an override for [the package mentioned in the package spec]. It might be sufficient to simply add setuptools-scm.
Resulting override:
```nix
{
python-ulid = super.python-ulid.overridePythonAttrs (
old: {
nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ self.setuptools-scm ];
}
);
}
```