lablgtk-extras 1.6

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 lablgtk-extras.1.6 & camlp4.4.12+1 & conf-gtk2.1 & conf-gtksourceview.2 & conf-pkg-config.2 & config-file.1.2.1 & cppo.1.6.9 & dune.3.4.1 & lablgtk.2.18.12 & ocamlbuild.0.14.1 & ocamlfind.1.9.5 & topkg.1.0.5 & xmlm.1.4.0:   * 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=lablgtk-extras.1.6,camlp4.4.12+1,conf-gtk2.1,conf-gtksourceview.2,conf-pkg-config.2,config-file.1.2.1,cppo.1.6.9,dune.3.4.1,lablgtk.2.18.12,ocamlbuild.0.14.1,ocamlfind.1.9.5,topkg.1.0.5,xmlm.1.4.0' returned 20