31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
# Hy {#sec-language-hy}
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## Installation {#ssec-hy-installation}
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### Installation without packages {#installation-without-packages}
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You can install `hy` via nix-env or by adding it to `configuration.nix` by referring to it as a `hy` attribute. This kind of installation adds `hy` to your environment and it successfully works with `python3`.
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::: {.caution}
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Packages that are installed with your python derivation, are not accessible by `hy` this way.
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:::
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### Installation with packages {#installation-with-packages}
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Creating `hy` derivation with custom `python` packages is really simple and similar to the way that python does it. Attribute `hy` provides function `withPackages` that creates custom `hy` derivation with specified packages.
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For example if you want to create shell with `matplotlib` and `numpy`, you can do it like so:
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```ShellSession
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$ nix-shell -p "hy.withPackages (ps: with ps; [ numpy matplotlib ])"
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```
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Or if you want to extend your `configuration.nix`:
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```nix
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{ # ...
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environment.systemPackages = with pkgs; [
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(hy.withPackages (py-packages: with py-packages; [ numpy matplotlib ]))
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];
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}
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```
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