OCaml Package Manager

opam is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow. Managing your OCaml installation can be as simple as:

opam list -a         # List the available packages
opam install lwt     # Install LWT
opam update          # Update the package list
...
opam upgrade         # Upgrade the installed packages to their latest version

Download and install opam » How to use opam »

News

2025-05-05 opam 2.4.0 alpha2 release

2025-04-18 opam 2.4.0 alpha1 release

2024-11-13 opam 2.3.0 release

2024-10-30 opam 2.3.0 rc1 release

2024-10-23 opam 2.3.0 beta2 release

2024-10-15 opam 2.3.0 beta1 release

2024-09-19 opam 2.3.0 alpha1 release

2024-08-22 opam 2.2.1 release

2024-07-01 opam 2.2.0 release

2024-06-21 opam 2.2.0 rc1 release

Contribute

Report bugs and ask for features in the opam tool
Report packaging issues or request new packages

Address general queries on the tool and packages
Discuss the tool internals
Check the state of the packages

Documentation

Installing opam

Creating Packages

The opam Manual

New packages
sail_sv_backend 0.19.1	Jun 12
sail_smt_backend 0.19.1	Jun 12
sail_output 0.19.1	Jun 12
sail_ocaml_backend 0.19.1	Jun 12
sail_manifest 0.19.1	Jun 12
sail_lem_backend 0.19.1	Jun 12
sail_lean_backend 0.19.1	Jun 12
sail_latex_backend 0.19.1	Jun 12
sail_doc_backend 0.19.1	Jun 12
sail_coq_backend 0.19.1	Jun 12
all packages

OCaml Package Manager

News

Contribute

Documentation

4526 packages