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BEAM docs: recommend nix-shell -p and shell.nix instead of nix-env (#255131)

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* BEAM docs: recommend `nix-shell -p` and `shell.nix` instead of `nix-env`

Co-authored-by: asymmetric <lorenzo@mailbox.org>
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Valentin Gagarin 2023-09-18 16:34:30 +02:00 committed by GitHub
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doc/languages-frameworks/beam.section.md
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@ -44,11 +44,29 @@ There is also a `buildMix` helper, whose behavior is closer to that of `buildErl
## How to Install BEAM Packages {#how-to-install-beam-packages}
BEAM builders are not registered at the top level, simply because they are not relevant to the vast majority of Nix users. To install any of those builders into your profile, refer to them by their attribute path `beamPackages.rebar3`:
BEAM builders are not registered at the top level, simply because they are not relevant to the vast majority of Nix users.
To use any of those builders into your environment, refer to them by their attribute path under `beamPackages`, e.g. `beamPackages.rebar3`:
::: {.example #ex-beam-ephemeral-shell}
# Ephemeral shell
```ShellSession
$ nix-env -f "<nixpkgs>" -iA beamPackages.rebar3
$ nix-shell -p beamPackages.rebar3
```
:::
::: {.example #ex-beam-declarative-shell}
# Declarative shell
```nix
let
pkgs = import <nixpkgs> { config = {}; overlays = []; };
in
pkgs.mkShell {
packages = [ pkgs.beamPackages.rebar3 ];
}
```
:::
## Packaging BEAM Applications {#packaging-beam-applications}