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Add example for nix develop

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Jennings Zhang 2025-08-11 01:52:06 -04:00 • committed by GitHub
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@ -155,6 +155,20 @@ install-nix-action's own `extra_nix_config` input:
substituters = https://hydra.iohk.io https://cache.nixos.org/ substituters = https://hydra.iohk.io https://cache.nixos.org/
``` ```
### How do I use `nix develop`?
`nix develop` can be used for `steps[*].shell`.
```yaml
# optional step: build devShell in advance for accuracy of subsequent step timing and result
- name: Build devShell
run: nix build --no-link .#devShell.$(uname -m)-linux
- name: Run a command with nix develop
shell: 'nix develop -c bash -e {0}'
run: echo "hello, pure world!"
```
### How do I pass environment variables to commands run with `nix develop` or `nix shell`? ### How do I pass environment variables to commands run with `nix develop` or `nix shell`?
Nix runs commands in a restricted environment by default, called `pure mode`. Nix runs commands in a restricted environment by default, called `pure mode`.