Why opam doesn't want to upgrade to liquidsoap 2.2.3 error liquidsoap-lang.2.2.3?

[918483]

[ERROR] The compilation of liquidsoap-lang.2.2.3 failed at "dune build -p liquidsoap-lang -j 23 --promote-install-files=false @install".

#=== ERROR while compiling liquidsoap-lang.2.2.3 ==============================#
# context     2.1.5 | linux/x86_64 | ocaml-base-compiler.4.14.0 | https://opam.ocaml.org#cd449b28
# path        ~/.opam/4.14.0/.opam-switch/build/liquidsoap-lang.2.2.3
# command     ~/.opam/opam-init/hooks/sandbox.sh build dune build -p liquidsoap-lang -j 23 --promote-install-files=false @install
# exit-code   1
# env-file    ~/.opam/log/liquidsoap-lang-3541964-a56a5b.env
# output-file ~/.opam/log/liquidsoap-lang-3541964-a56a5b.out
### output ###
# File "src/lang/dune", line 69, characters 10-13:
# 69 |      (run git rev-parse --short HEAD))
#                ^^^
# Error: Program git not found in the tree or in PATH
#  (context: default)



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build liquidsoap-lang 2.2.3
└─
┌─ The following changes have been performed (the rest was aborted)
│ ↗ upgrade camomile 1.0.2 to 2.0.0
│ ↗ upgrade duppy    0.9.2 to 0.9.3
│ ∗ install cry      1.0.1
└─

[vitoyucepi]

Error: Program git not found in the tree or in PATH

You should install git using your system package manager.

liquidsoap/src/lang/dune

Lines 67 to 69 in dd8ce14

	(with-accepted-exit-codes
	(or 0 128)
	(run git rev-parse --short HEAD))