#25 [20/22] RUN /usr/bin/opam install opam-core opam-state opam-solver opam-repository opam-format opam-client --deps
  #25 0.571 [NOTE] External dependency handling not supported for OS family 'altlinux'.
  #25 0.571        You can disable this check using 'opam option --global depext=false'
  #25 8.647 The following actions will be performed:
  #25 8.647 === install 27 packages
  #25 8.647   - install 0install-solver    2.18       [required by opam-0install-cudf]
  #25 8.647   - install base64             3.5.1      [required by opam-client]
  #25 8.647   - install bz2                0.8.0
  #25 8.647   - install camlbz2            transition
  #25 8.647   - install cmdliner           1.3.0      [required by opam-client]
  #25 8.647   - install conf-c++           1.0        [required by mccs]
  #25 8.647   - install conf-libbz2        1
  #25 8.648   - install cppo               1.8.0      [required by extlib]
  #25 8.648   - install cudf               0.10       [required by opam-solver]
  #25 8.648   - install dose3              7.0.0      [required by opam-solver]
  #25 8.648   - install dune               3.18.1     [required by opam-solver, opam-format, opam-client, etc.]
  #25 8.648   - install extlib             1.8.0      [required by cudf, dose3]
  #25 8.648   - install jsonm              1.0.2      [required by opam-core]
  #25 8.648   - install mccs               1.1+19     [required by opam-solver]
  #25 8.648   - install ocamlbuild         0.16.1     [required by jsonm]
  #25 8.648   - install ocamlfind          1.9.8      [required by jsonm]
  #25 8.648   - install ocamlgraph         2.2.0      [required by opam-core]
  #25 8.648   - install opam-0install-cudf 0.5.0      [required by opam-solver]
  #25 8.648   - install opam-file-format   2.1.6      [required by opam-format]
  #25 8.648   - install re                 1.12.0     [required by opam-solver, opam-core, opam-client, etc.]
  #25 8.648   - install seq                base       [required by re]
  #25 8.648   - install sha                1.15.4     [required by opam-core]
  #25 8.648   - install spdx_licenses      1.3.0      [required by opam-state]
  #25 8.648   - install stdlib-shims       0.3.0      [required by sha, dose3]
  #25 8.648   - install swhid_core         0.1        [required by opam-core]
  #25 8.648   - install topkg              1.0.8      [required by jsonm]
  #25 8.648   - install uutf               1.0.4      [required by opam-core]
  #25 8.648 [NOTE] External dependency handling not supported for OS family 'altlinux'.
  #25 8.648        You can disable this check using 'opam option --global depext=false'

+ /usr/bin/opam install . --deps
The following actions will be performed:
=== install 5 packages
  - install opam-core       2.4.0~alpha2~dev
  - install opam-format     2.4.0~alpha2~dev
  - install opam-repository 2.4.0~alpha2~dev
  - install opam-state      2.4.0~alpha2~dev
  - install patch           3.0.0~alpha1     [required by opam-core, opam-repository]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Error:  Could not synchronize /opam/root/this-opam/.opam-switch/sources/opam-format.2.4.0~alpha2~dev from "git+file:///github/workspace#HEAD":
        "/usr/bin/git fetch -q" exited with code 128
Error:  Failed to get sources of opam-format.2.4.0~alpha2~dev: git+file:///github/workspace#HEAD
Error:  Could not synchronize /opam/root/this-opam/.opam-switch/sources/opam-core.2.4.0~alpha2~dev from "git+file:///github/workspace#HEAD":
        "/usr/bin/git fetch -q" exited with code 128
Error:  Failed to get sources of opam-core.2.4.0~alpha2~dev: git+file:///github/workspace#HEAD
Error:  Could not synchronize /opam/root/this-opam/.opam-switch/sources/opam-repository.2.4.0~alpha2~dev from "git+file:///github/workspace#HEAD":
        "/usr/bin/git fetch -q" exited with code 128
Error:  Failed to get sources of opam-repository.2.4.0~alpha2~dev: git+file:///github/workspace#HEAD
Error:  Could not synchronize /opam/root/this-opam/.opam-switch/sources/opam-state.2.4.0~alpha2~dev from "git+file:///github/workspace#HEAD":
        "/usr/bin/git fetch -q" exited with code 128
Error:  Failed to get sources of opam-state.2.4.0~alpha2~dev: git+file:///github/workspace#HEAD
-> retrieved patch.3.0.0~alpha1  (https://opam.ocaml.org/cache)
-> installed patch.3.0.0~alpha1

#=== ERROR while fetching sources for opam-state.2.4.0~alpha2~dev =============#
OpamSolution.Fetch_fail("git+file:///github/workspace#HEAD")