$ opam list
Installed packages for 4.02.0+rc1:
base-bigarray base Bigarray library distributed with the OCaml compiler
base-threads base Threads library distributed with the OCaml compiler
base-unix base Unix library distributed with the OCaml compiler
ocp-indent 0.1.0 A simple tool to indent OCaml programs
$ opam show ocp-indent
package: ocp-indent
version: 0.1.0
upstream-kind: http
upstream-checksum: d8f4050700a12f77c0d157ac931cac5f
installed-version: ocp-indent.0.1.0 [4.02.0+rc1]
available-versions: 0.6.0, 0.6.1, 0.6.2, 0.9.0, 0.9.2, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.3.0, 1.3.1, 1.3.2, 1.4.0, 1.4.1
description: A simple tool to indent OCaml programs