altgr-ergo 1.01

Error log

The package failed to build. The error log from opam follows.

You are using opam 2.1+, where external dependency handling has been integrated: consider calling opam directly, the 'depext' plugin interface is provided for backwards compatibility only
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for altgr-ergo.1.01 & zarith.1.13 & ocamlfind.1.9.6 & num.1.5 & lablgtk.2.18.13 & dune.3.15.3 & conf-pkg-config.3 & conf-gtksourceview.2 & conf-gtk2.1 & conf-gmp.4 & camlp-streams.5.0.1:   * Missing dependency:
            - conf-gtksourceview
            depends on the unavailable system package 'libgtksourceview2.0-dev'. Use `--no-depexts' to attempt installation anyway, or it is possible that a depext package name in the opam file is incorrect.


Command failed: opam --cli=2.1 list --readonly --external '--resolve=altgr-ergo.1.01,zarith.1.13,ocamlfind.1.9.6,num.1.5,lablgtk.2.18.13,dune.3.15.3,conf-pkg-config.3,conf-gtksourceview.2,conf-gtk2.1,conf-gmp.4,camlp-streams.5.0.1' returned 20