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nix-justfile

Conventions for writing justfile recipes in Nix-based projects.

Skill by juspay

IndexedMIT★ 11
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/juspay-nix-justfile

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About

Conventions for writing justfile recipes in Nix-based projects.

Use cases: writing

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/nix-justfile

What's inside

Skill name
nix-justfile
Description
Conventions for writing justfile recipes in Nix-based projects.
License
MIT
Instructions
21 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# Justfile in Nix projects

## Doc comments

Every recipe must have a doc comment (`#` line above the recipe name).

## Devshell detection

Use a `nix_shell` variable to auto-detect whether we're inside `nix develop`:

```just
nix_shell := if env('IN_NIX_SHELL', '') != '' { '' } else { 'nix develop -c' }
```

Prefix commands that need devshell tools (node, trunk, cargo-watch, etc.) with `{{nix_shell}}`. Recipes that invoke `nix` directly (build, run, flake commands) don't need it.

## Legibility

Long chained commands should use multiline `\` continuations.

From juspay/skills, MIT.

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11
Forks
0
Open issues
3
Last commit (this folder)
Sep 16, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

nix-justfile skill. Agent Mart. https://agentmart.dev/skills/juspay-nix-justfile (last updated 2026-10-24)