Ability to run tasks without installing?

[madisp]

We have a multi-language monorepo setup so a bunch of tools are all present in the repo root mise.toml. Running any task with mise run ... will install all of those tools.

While this is great for local use, however we'd like to use mise run ... also in CI where it's a bit suboptimal - we'd like to explicitly control what tools get installed in CI while still using mise run for re-use between local development and CI scripts.

I checked and there's no --skip-install or similar in mise run --help - perhaps it would be advantageous to add one?

[madisp]

NOTE: I managed to roundabout finagle this by utilizing MISE_IGNORED_CONFIG_PATHS so the root mise.toml gets ignored and no tools get installed.

[KyleKing]

I have a workaround by using multiple configuration files and setting the MISE_ENV locally in an untracked mise.local.toml:

1. Manual steps: https://github.com/KyleKing/yak-shears/blob/46fefc0cd620f71e406d3472b9fa6d9a56ee29ea/README.md#L46-L50
2. Tracked configuration: https://github.com/KyleKing/yak-shears/tree/46fefc0cd620f71e406d3472b9fa6d9a56ee29ea/.config
3. CI: https://github.com/KyleKing/yak-shears/blob/46fefc0cd620f71e406d3472b9fa6d9a56ee29ea/.github/workflows/ci.yaml

Example run: https://github.com/KyleKing/yak-shears/actions/runs/14348486066/job/40222650168

I'm still working out the implementation, but this might be useful as an alternative to consider. I'm open to feedback if you've found a pattern that works for your team!

Additionally, there may eventually be a change for toggling tools here: https://github.comjdx/mise/discussions/4777

---

Update: use the new enable tools!! 🎉

[jazoom]

These might do the trick:

https://mise.jdx.dev/configuration/settings.html#auto_install

https://mise.jdx.dev/configuration/settings.html#auto_install_disable_tools

[tuukkamustonen]

Yeah, setting something like MISE_ENABLE_TOOLS=dummy worked for me. Maybe MISE_ENABLE_TOOLS= would work even better.

[artemklevtsov]

MISE_ENABLE_TOOLS= not works.

[jdx]

There are actually a couple of existing options for this:

• MISE_TASK_RUN_AUTO_INSTALL=false — disables auto-installing tools when running tasks. Tools already installed are still used, but missing ones won't be installed.
• MISE_AUTO_INSTALL=false — global version of the above, affects all mise commands.
• MISE_AUTO_INSTALL_DISABLE_TOOLS=nodejs,python,... — selectively skip specific tools.

That said, a CLI flag is more ergonomic for one-off CI use, so we've added --skip-tools in #8699. Usage:

# Skip tool installation
mise run --skip-tools build

# The flag must come before the task name — after the task name it gets passed through as a task argument
mise run build --skip-tools  # this passes --skip-tools to the task itself

This comment was generated by Claude Code.

[artemklevtsov]

Can I force mise to auto install only the currently called tools?

[bamaas]

I have the same challenge. When I want to run a simple linter I don’t need the full blown tool environment. I’m considering using mise tool stubs, still have to experiment with it.