devenv

Name: devenv
Availability: InStock
Author: cachix

Supports UI

by cachix

Declarative, reproducible developer environments powered by Nix with built-in MCP server support.

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Works in:Cursor

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What it does

devenv provides a high-level interface for managing developer environments using Nix. It allows developers to define their entire toolchain, including languages, packages, and services, in a single declarative file (devenv.nix), ensuring consistency across a team.

Tools

mcp: Launches a Model Context Protocol server to allow AI assistants to search for packages and options within nixpkgs.
search: Search for packages and options in nixpkgs.
shell: Activates the defined developer environment.
up: Starts background processes in the foreground.

Installation

To use the MCP server, install devenv and run the mcp command:

# Install devenv
curl -L https://devenv.sh/install.sh | sh

# Run MCP server
devenv mcp

Claude Desktop Config:

{
  "mcpServers": {
    "devenv": {
      "command": "devenv",
      "args": ["mcp"]
    }
  }
}

Supported hosts

Claude Desktop
Cursor

Quick install

curl -L https://devenv.sh/install.sh | sh

Information

Pricing: free
Published: 4/16/2026
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