# Install one-ml with Homebrew Reboot of ML, unifying its core and (now first-class) module layers. Version 0.1 via Homebrew; verified 2026-07-11. ## Install ```sh sudo av install brew:one-ml ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install one-ml ``` Evidence: local Homebrew formula metadata ## Package facts - **Package key:** brew:one-ml - **Package manager:** Homebrew - **Package manager page:** - **Version:** 0.1 - **Source summary:** Reboot of ML, unifying its core and (now first-class) module layers - **Homepage:** - **Upstream docs:** - **License:** Apache-2.0 - **Source archive:** - **Last updated:** 2026-07-11T09:50:48+09:00 - **Generated:** 2026-08-04T22:13:35+00:00 ## Executables - 1ml (cli) - 1ml (alias) ## Build dependencies - ocaml ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura ## Freshness - Page generated: 2026-08-04 - Package-manager version: 0.1 - Package-manager updated: 2026-07-11 - Local data: ok - Upstream repository: https://people.mpi-sws.org/~rossberg/1ml/ - info: Release/tag comparison is only available for GitHub repositories. ## Project history and usage 1ML is Andreas Rossberg's research reboot of ML that treats first-class modules as the starting point and collapses the traditional split between ML's core language and module language into one small language. ### Project history The 1ML line began as a research language and prototype interpreter tied to Rossberg's work on modules. The project page lists the original ICFP 2015 paper, an extended 2015 version with technical appendix, a 2016 extension with effect and generativity polymorphism, and a revised Journal of Functional Programming article published in 2018. The GitHub repository describes the code as a 2014 toy interpreter, written mainly to experiment with 1ML type checking. Its README is explicit about the prototype's limits: it is basic, omits many features expected from a real ML, has basic error messages, and implements type checking naively. ### Adoption history 1ML's adoption is primarily academic and experimental rather than production-language adoption. Homebrew packages the prototype as one-ml, making the 1ml executable easy to install for people who want to run examples from the papers or inspect the type-system design. ### How it is used Developers use the 1ml executable either as an interactive prompt or against .1ml files, often with the bundled prelude. The practical workflow is exploration: load the prelude, evaluate bindings, inspect type-checking behavior, and compare programs with the examples from the papers. ### Why package nerds care For package nerds, one-ml is a rare packaged research artifact: a runnable slice of programming-language theory where the package is not a general runtime so much as an executable companion to a type-system proposal. ### Timeline - 2014: the prototype interpreter README identifies the code as a 2014 proof-of-concept. - 2015: Rossberg's 1ML paper appeared at ICFP, with an extended version in the same year. - 2016: the project page lists 1ML with Special Effects as a WadlerFest extension. - 2018: the revised and expanded 1ML article appeared in Journal of Functional Programming. ### Sources - - - - ## Security Notes narrow executable package without higher-risk signals. - **Geiger risk:** green / low - narrow executable package without higher-risk signals ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** one-ml - **Version Scheme:** 0 - **Revision:** 2 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Related links - [Terminal utility packages](https://pkg.so/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Language runtime packages](https://pkg.so/language-runtime-packages/) - Matched language runtime, compiler, or interpreter metadata. - [Networking and protocol packages](https://pkg.so/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Package ecosystem packages](https://pkg.so/package-ecosystem-tools/) - Matched package manager, installer, dependency, registry, or publishing metadata. - [ocaml](https://pkg.so/brew/ocaml/) - Build dependency declared by Homebrew. - [ruby](https://pkg.so/brew/ruby/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [lua](https://pkg.so/brew/lua/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [algol68g](https://pkg.so/brew/algol68g/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [picat](https://pkg.so/brew/picat/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [arturo](https://pkg.so/brew/arturo/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [mosml](https://pkg.so/brew/mosml/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, ml, programming-language. - [latino](https://pkg.so/brew/latino/) - Shares pkgdb curated category or tags: cli, interpreter, language-runtime, programming-language. - [rust](https://pkg.so/brew/rust/) - Shares pkgdb curated category or tags: cli, language-runtime, programming-language. ## Combined YAML source View the package source record on GitHub. [combined/one-ml.yml](https://github.com/mxcl/pkgdb/blob/main/combined/one-ml.yml) ## Sources - pkg.so package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - pkgdb category and tag curation - package relationship graph - cross-ecosystem install command graph