OPAM  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


  new opam features: "opam build"

  opam 2.0 Beta is out!

  opam-lib 1.3 available

  opam 2.0 preview release!


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

Last week
7458 users
209630 package installations
20584 repository updates
Last month
24286 users
774716 package installations
80882 repository updates
Most Downloaded Packages (this month)
ocamlfind 25468
cppo 17974
result 15974
ppx_tools 14966
lwt 14066
ocamlbuild 13450
menhir 11972
yojson 11948
biniou 11464
topkg 11390
all packages