mise.lock Lockfile

mise.lock is a lockfile that pins exact versions and checksums of tools for reproducible environments. Lockfiles are not created automatically—you must run mise lock to generate them. Once a lockfile exists, mise will keep it updated as tools are installed or upgraded.

Overview

The lockfile serves similar purposes to package-lock.json in npm or Cargo.lock in Rust:

• Reproducible builds: Ensures everyone on your team uses exactly the same tool versions
• Security: Verifies tool integrity with checksums when supported by the backend
• Version pinning: Locks tools to specific versions while allowing flexibility in mise.toml
• Avoids API rate limits: By storing download URLs, future installs use the lockfile and do not need to call GitHub (or other providers), avoiding rate limits and the need for GITHUB_TOKEN in most cases

Enabling Lockfiles

Lockfiles are controlled by the lockfile setting:

# Enable lockfiles globally
mise settings lockfile=true

# Or set in mise.toml
[settings]
lockfile = true

How It Works

1. Lockfile Updates: Once a mise.lock file exists, running mise install or mise use updates it with the exact versions installed
2. Version Resolution: If a mise.lock exists, mise will prefer locked versions over version ranges in mise.toml
3. Checksum Verification: For supported backends, mise stores and verifies checksums of downloaded tools

File Format

mise.lock is a TOML file with a platform-based format that organizes asset information by platform:

# Example mise.lock
[[tools.node]]
version = "20.11.0"
backend = "core:node"

[tools.node.platforms.linux-x64]
checksum = "sha256:a6c213b7a2c3b8b9c0aaf8d7f5b3a5c8d4e2f4a5b6c7d8e9f0a1b2c3d4e5f6a7"
size = 23456789
url = "https://nodejs.org/dist/v20.11.0/node-v20.11.0-linux-x64.tar.xz"

[[tools.python]]
version = "3.11.7"
backend = "core:python"

[tools.python.platforms.linux-x64]
checksum = "sha256:def456..."
size = 12345678

# Tool with backend-specific options
[[tools.ripgrep]]
version = "14.1.1"
backend = "aqua:BurntSushi/ripgrep"
options = { exe = "rg" }

[tools.ripgrep.platforms.linux-x64]
checksum = "sha256:4cf9f2741e6c465ffdb7c26f38056a59e2a2544b51f7cc128ef28337eeae4d8e"
size = 1234567

Platform Information

Each platform in a tool's [tools.name.platforms] section uses a key format like "os-arch" (e.g., "linux-x64", "macos-arm64") and can contain:

• checksum (optional): SHA256 or Blake3 hash for integrity verification
• size (optional): File size in bytes for download validation
• url (optional): Original download URL for reference or re-downloading

Tool Entry Fields

Each tool entry ([[tools.name]]) can contain:

• version (required): The exact version of the tool
• backend (optional): The backend used to install the tool (e.g., core:node, aqua:BurntSushi/ripgrep)
• options (optional): Backend-specific options that identify the artifact (e.g., {exe = "rg", matching = "musl"})
• platforms (optional): Platform-specific metadata (checksums, URLs, sizes)

Platform Keys

The platform key format is generally os-arch but can be customized by backends:

• Standard format: linux-x64, macos-arm64, windows-x64
• Backend-specific: Some backends like Java may use more specific platform identifiers
• Tool-specific: Backends like ubi may include additional tool-specific information in the platform key

Environment-Specific Lockfiles

When using environment-specific configuration files (e.g., mise.test.toml), each environment gets its own lockfile:

Config file	Lockfile
mise.toml	mise.lock
mise.test.toml	mise.test.lock
mise.staging.toml	mise.staging.lock
mise.local.toml	mise.local.lock
mise.test.local.toml	mise.test.local.lock

For example, with MISE_ENV=test:

MISE_ENV=test mise lock  # creates mise.lock AND mise.test.lock

Tools from mise.toml go to mise.lock, tools from mise.test.toml go to mise.test.lock.

Resolution: When MISE_ENV=test, mise reads mise.test.lock for tools defined in mise.test.toml and mise.lock for tools in mise.toml. Environment-specific lockfiles are strictly scoped to their corresponding config — they only contain tools defined in that config.

This design means CI environments that don't set MISE_ENV only depend on mise.lock, so dev tool version bumps in mise.dev.lock won't invalidate CI caches.

Both mise.lock and mise.<env>.lock files should be committed to version control. mise.local.lock and mise.<env>.local.lock should be gitignored alongside their corresponding config files.

Local Lockfiles

Tools defined in mise.local.toml (which is typically gitignored) use a separate mise.local.lock file. This keeps local tool configurations separate from the committed lockfile.

# mise.local.toml tools go to mise.local.lock
mise use --path mise.local.toml node@22

# Regular mise.toml tools go to mise.lock
mise use --path mise.toml node@20

Use mise lock --local to update the local lockfile for all platforms:

mise lock --local              # update mise.local.lock
mise lock --local node python  # update specific tools in mise.local.lock

Strict Lockfile Mode

The locked setting enforces that all tools have pre-resolved URLs in the lockfile before installation. This prevents API calls to GitHub, aqua registry, etc., ensuring fully reproducible installations.

# Enable strict mode
mise settings locked=true

# Or via environment variable
MISE_LOCKED=1 mise install

WARNING

All mise settings are global in scope. Setting locked = true in a project's mise.toml applies to all tool resolution, including tools from your global ~/.config/mise/config.toml. If you see warnings about global tools missing from the lockfile, run mise lock -g to generate a global lockfile.

When enabled, mise install will fail if a tool doesn't have a URL for the current platform in the lockfile. To fix this, first populate the lockfile with URLs:

mise lock                    # generate URLs for all platforms
mise lock --platform linux-x64,macos-arm64  # or specific platforms

This is useful for CI environments where you want to guarantee reproducible builds without any external API dependencies.

Workflow

Initial Setup

# Generate the lockfile
mise lock

# Install tools using locked versions
mise install

Daily Usage

# Install exact versions from lockfile
mise install

# Update tools and lockfile
mise upgrade

Updating Versions

When you want to update tool versions:

# Update tool version in mise.toml
mise use node@24

# This will update both the installation and mise.lock

Backend Support

Backend support for lockfile features varies:

• ✅ Full support (version + checksum + size + URL): aqua, http, github, gitlab
  • Provenance support: aqua, github, core:python (precompiled binaries), core:ruby (precompiled binaries), core:zig (install-time)
• ⚠️ Partial support (version + URL + provenance): vfox (tool plugins only)
• ⚠️ Partial support (version + checksum + size): ubi
• 📝 Basic support (version + checksum): core (some tools)
• 📝 Version only: asdf, npm, cargo, pipx
• 📝 Planned: More backends will add full asset tracking support over time

Best Practices

Version Control

# Always commit the lockfile
git add mise.lock
git commit -m "Update tool versions"

Team Workflow

1. Team Lead: Updates mise.toml with new version ranges
2. Team Lead: Runs mise install to update mise.lock
3. Team Lead: Commits both files
4. Team Members: Pull changes and run mise install to get exact versions

CI/CD

# Example GitHub Actions
- name: Install tools
  run: |
    mise install  # Uses exact versions from mise.lock

- name: Cache lockfile
  uses: actions/cache@v5
  with:
    key: mise-lock-${{ hashFiles('mise.lock') }}

Troubleshooting

Regenerating Checksums

If checksums become invalid or you need to regenerate them:

# Remove all tools and reinstall
mise uninstall --all
mise install

Lockfile Conflicts

When merging branches with different lockfiles:

1. Resolve conflicts in mise.lock
2. Run mise install to verify everything works
3. Commit the resolved lockfile

Disabling for Specific Projects

# In project's mise.toml
[settings]
lockfile = false

Migration from Other Tools

From asdf

# Convert .tool-versions to mise.toml
mise config generate

# Enable lockfiles and generate the lockfile
mise settings lockfile=true
mise lock
mise install

From package.json engines

# Set versions based on package.json
mise use node@$(jq -r '.engines.node' package.json)

Provenance and Security

When mise lock generates a lockfile, it records a provenance type (e.g., slsa, cosign, minisign, github-attestations) for each tool. For the current platform, mise downloads the artifact and performs full cryptographic verification at lock time -- ensuring the provenance entry in the lockfile is backed by actual verification, not just registry metadata. This applies to both the aqua and github backends. For cross-platform entries, provenance is detected from registry metadata without verification (since the artifact may not be runnable on the current machine).

By default, when mise install sees a lockfile with both a checksum and a provenance entry, it trusts the lockfile and skips re-verification. This avoids redundant API calls (e.g., GitHub attestation queries) which can cause rate limit issues in CI. Since the current platform's provenance was already verified during mise lock, this is safe.

For additional security, you can force provenance re-verification at install time on every install:

[settings]
locked_verify_provenance = true

Or via environment variable:

MISE_LOCKED_VERIFY_PROVENANCE=1 mise install

This is also automatically enabled in paranoid mode:

[settings]
paranoid = true

When enabled, every mise install will cryptographically verify provenance regardless of what the lockfile contains, ensuring the artifact was built by a trusted CI pipeline.

Minimum Release Age

In addition to lockfiles, mise supports the install_before setting to limit supply chain risk by only installing versions that have been available for a minimum amount of time:

[settings]
install_before = "7d"  # only resolve to versions released more than 7 days ago

This pairs well with lockfiles — use install_before to avoid picking up brand-new releases, and lockfiles to pin the exact versions you've vetted.

See Also

• Configuration Settings - All available settings
• Tool Version Management - How tool versions work
• Backends - Backend-specific checksum support