Ubi Backend <Badge type="danger" text="deprecated" />

::: warning The ubi backend is deprecated. Use the GitHub backend instead.

The GitHub backend offers several advantages over ubi, including provenance verification, download progress reports, and fewer dependencies. To migrate, replace ubi:owner/repo with github:owner/repo in your configuration files. The matching and matching_regex options carry over. One behavioral difference is worth noting: ubi applies the substring matching only as a tiebreaker among assets that already match your OS/arch, and skips it when a single asset matches the platform. The GitHub backend applies matching as a pre-filter before autodetection, so for multi-binary releases you get the binary your filter names, or a clear error naming the filter if it isn't published for your platform.

One migration gotcha: ubi folds matching into the install path, so you can install several binaries from one repo via separate matching values on the same ubi:owner/repo string. The GitHub backend keeps the install path keyed by tool name + version only, so two github:owner/repo entries with different matching values resolve to the same directory and the second overwrites the first. If you rely on that ubi pattern, give each binary its own tool_alias on GitHub so each gets its own install directory. :::

This page documents existing ubi configurations. For new installations, use the GitHub, GitLab, or HTTP backend as appropriate.

Usage

Migrate one tool at a time. For a simple release install, change:

[tools]
"ubi:BurntSushi/ripgrep" = "14.1.1"

To:

[tools]
"github:BurntSushi/ripgrep" = "14.1.1"

Then run mise install and mise exec -- rg --version. Check custom options against the destination backend: for example, exe and extract_all are ubi options and should not be copied blindly. Regenerate and review any lockfile. Keep the old installation until the replacement works.

For multiple binaries, follow the alias migration described above. A direct ubi:https://... download belongs in an HTTP tool entry.

Tool Options

The following tool-options are available for the ubi backend—these go in [tools] in mise.toml.

exe

The exe option allows you to specify the executable name in the archive. This is useful when the archive contains multiple executables.

If you get an error like could not find any files named cli in the downloaded zip file, you can use the exe option to specify the executable name:

[tools]
"ubi:cli/cli" = { version = "latest", exe = "gh" } # github's cli

rename_exe

The rename_exe option allows you to specify the name of the executable once it has been extracted.

Use the rename_exe option to specify the target executable name:

[tools]
"ubi:cli/cli" = { version = "latest", exe = "gh", rename_exe = "github" } # github's cli

matching

Set a string to match against the release filename when there are multiple files for your OS/arch, e.g. "gnu", "musl", or "msvc". This is only used when more than one release filename matches your OS/arch; if only one release asset matches, the option is ignored.

[tools]
"ubi:BurntSushi/ripgrep" = { version = "latest", matching = "musl" }

matching_regex

Set a regular expression to match against release filenames before matching against OS/arch. If the pattern yields a single match, that file is selected. If nothing matches, ubi reports an error.

[tools]
"ubi:shader-slang/slang" = { version = "latest", matching_regex = "\\d+\\.tar" }

provider

Set the provider used to fetch assets and release information: either github or gitlab (default github). Set provider explicitly when you use api_url, since the type probably cannot be derived correctly from the URL.

[tools]
"ubi:gitlab-org/cli" = { version = "latest", exe = "glab", provider = "gitlab" }

api_url

Set the URL for the provider's API. This is useful when using a self-hosted instance.

[tools]
"ubi:acme/my-tool" = {
  version = "latest",
  provider = "gitlab",
  api_url = "https://gitlab.acme.com/api/v4",
}

extract_all

Set to true to extract all files in the tarball instead of only the binary. Not compatible with exe or rename_exe.

[tools]
"ubi:helix-editor/helix" = { version = "latest", extract_all = true }

bin_path

The directory in the tarball containing the binaries. This is useful when the binary is not at the root of the tarball, and it only makes sense when extract_all is set to true.

[tools]
"ubi:owner/repo" = {
  version = "latest",
  extract_all = true,
  bin_path = "target/release", # match the archive's actual layout
}

Binary path lookup order:

1. If bin_path is specified, use that directory
2. If extract_all is set to true, use the install path root
3. If bin_path is not set, look for a bin/ directory in the install path
4. If no bin/ directory exists, use the root of the extracted directory

tag_regex

Set a regex to filter out tags that don't match it. This is useful when a vendor publishes releases for unrelated CLIs in the same repo. For example, cargo-bins/cargo-binstall has many releases for CLIs other than cargo-binstall; this option filters those releases out.

[tools]
"ubi:cargo-bins/cargo-binstall" = { version = "latest", tag_regex = '^\d+\.' }

Self-hosted GitHub/GitLab

If you are using a self-hosted GitHub/GitLab instance, you can set the provider and api_url tool options. Additionally, you can set the MISE_GITHUB_ENTERPRISE_TOKEN or MISE_GITLAB_ENTERPRISE_TOKEN environment variable to authenticate with the API.

Supported Ubi Syntax

• GitHub shorthand for latest release version: ubi:goreleaser/goreleaser
• GitHub shorthand for specific release version: ubi:goreleaser/[email protected]
• URL syntax: ubi:https://github.com/goreleaser/goreleaser/releases/download/v1.16.2/goreleaser_Darwin_arm64.tar.gz

Troubleshooting ubi

ubi resolver can't find os/arch

Sometimes vendors name their releases in ways ubi can't figure out, possibly only for a specific OS/arch combination. For example, in this ticket a vendor used "mac" instead of the more common "macos" or "darwin" tags.

For an existing ubi install, compare with a separately installed ubi CLI if you need to isolate its resolver. Run this in an empty scratch directory:

ubi -p jdx/mise
./bin/mise --version

ubi picks the wrong tarball

A GitHub release may have many tarballs, some of which don't contain the CLI you want. Use the matching field to specify a string to match against the release filenames.

mise use 'ubi:tamasfe/taplo[matching=full]'
# or with ubi directly
ubi -p tamasfe/taplo -m full

ubi can't find the binary in the tarball

ubi assumes the repo name is the same as the binary name, but that is often not the case. For example, BurntSushi/ripgrep provides a binary named rg, not ripgrep. In this case, specify the binary name with the exe field:

mise use 'ubi:BurntSushi/ripgrep[exe=rg]'
# or with ubi directly
ubi -p BurntSushi/ripgrep -e rg

ubi uses weird versions

This issue is with mise, not ubi. mise needs to list the available versions of a tool so that "latest" points to the actual latest release of the CLI. Sometimes vendors publish GitHub releases for unrelated things. For example, cargo-bins/cargo-binstall is the repo for cargo-binstall, but it also has many releases for unrelated CLIs. Filter these out with the tag_regex tool option:

mise use 'ubi:cargo-bins/cargo-binstall[tag_regex=^\d+\.]'

Now when running mise ls-remote ubi:cargo-bins/cargo-binstall[tag_regex=^\d+\.] you should only see versions starting with a number. This command's output is cached, so you will likely need to run mise cache clear first.