Building on x86-bm-14.ocamllabs.io (from ocaml/opam:debian-unstable) 2022-01-02 04:34.49 ---> using "0acd5aeaa8f7bc314514d9795d14a7f12ec72a6a5b11c5904350189734c6859b" from cache /: (user (uid 1000) (gid 1000)) /: (env OPAMPRECISETRACKING 1) /: (env OPAMUTF8 never) /: (env OPAMEXTERNALSOLVER builtin-0install) /: (env OPAMCRITERIA +removed) /: (run (shell "sudo ln -f /usr/bin/opam-2.1 /usr/bin/opam")) 2022-01-02 04:34.49 ---> using "4d29eb3e0b7cd69a97ed90837671d5ca38aa41e2fb94346298af500378eca6fa" from cache /: (run (network host) (shell "rm -rf ~/opam-repository && git clone -q 'https://github.com/ocaml/opam-repository' ~/opam-repository && git -C ~/opam-repository checkout -q 8ac7f1657038ae1b7a02e64d87aeb06912f4ca1c")) 2022-01-02 04:34.49 ---> using "0100302b458cd7f99084008cbb3689a3574b8bf20b782f0ddf1ff5969c6c5ace" from cache /: (run (shell "rm -rf ~/.opam && opam init -ya --bare --config ~/.opamrc-sandbox ~/opam-repository")) Configuring from /home/opam/.opamrc-sandbox, then /home/opam/.opamrc, and finally from built-in defaults. Checking for available remotes: rsync and local, git. - you won't be able to use mercurial repositories unless you install the hg command on your system. - you won't be able to use darcs repositories unless you install the darcs command on your system. <><> Fetching repository information ><><><><><><><><><><><><><><><><><><><><><> [default] Initialised User configuration: ~/.profile is already up-to-date. [NOTE] Make sure that ~/.profile is well sourced in your ~/.bashrc. 2022-01-02 04:34.49 ---> using "96784e14b90597d9836bbfbd5d72400d6a30be51d8291df44ab311fc06b34787" from cache /: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "opam switch create --repositories=default '4.10' '4.10.2'")) <><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><> Switch invariant: ["ocaml-base-compiler" {= "4.10.2"} | "ocaml-system" {= "4.10.2"}] <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> -> installed base-bigarray.base -> installed base-threads.base -> installed base-unix.base -> retrieved ocaml-base-compiler.4.10.2 (https://github.com/ocaml/ocaml/archive/4.10.2.tar.gz) -> installed ocaml-base-compiler.4.10.2 -> installed ocaml-config.1 -> installed ocaml.4.10.2 Done. # Run eval $(opam env --switch=4.10) to update the current shell environment 2022-01-02 04:34.49 ---> using "d471adc26f3b1825531777a9229fc4c3ac251c150f68772d24d6c5305b25037a" from cache /: (run (network host) (shell "opam update --depexts")) + /usr/bin/sudo "apt-get" "update" - Get:1 http://deb.debian.org/debian unstable InRelease [165 kB] - Get:2 http://deb.debian.org/debian unstable/main amd64 Packages.diff/Index [63.6 kB] - Get:3 http://deb.debian.org/debian unstable/main amd64 Packages T-2022-01-02-0201.35-F-2021-12-24-0808.18.pdiff [331 kB] - Get:3 http://deb.debian.org/debian unstable/main amd64 Packages T-2022-01-02-0201.35-F-2021-12-24-0808.18.pdiff [331 kB] - Fetched 559 kB in 2s (320 kB/s) - Reading package lists... - 2022-01-02 04:34.49 ---> using "384982901b7c8d8a6ad6f60012d8c09e6d0a07e7dd90f50bb6f8effd419171c3" from cache /: (run (cache (opam-archives (target /home/opam/.opam/download-cache))) (network host) (shell "\ \nopam remove -y \"apero-net.0.4.7\"\ \nopam install -vy \"apero-net.0.4.7\"\ \nres=$?\ \nif [ $res = 31 ]; then\ \n if opam show -f x-ci-accept-failures: \"apero-net.0.4.7\" | grep -q '\"debian-unstable\"'; then\ \n echo \"This package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\"\ \n exit 69\ \n fi\ \nfi\ \n\ \n\ \nexit $res\ \n")) Nothing to do. [NOTE] apero-net.0.4.7 is not installed. [ERROR] Package conflict! No solution found, exiting * No agreement on the version of ocaml: - (invariant) -> ocaml-base-compiler = 4.10.2 -> ocaml = 4.10.2 - apero-net -> ppx_deriving = 4.4 -> ocaml < 4.10.0 You can temporarily relax the switch invariant with `--update-invariant' 'opam install -vy apero-net.0.4.7' failed. "/bin/bash" "-c" " opam remove -y "apero-net.0.4.7" opam install -vy "apero-net.0.4.7" res=$? if [ $res = 31 ]; then if opam show -f x-ci-accept-failures: "apero-net.0.4.7" | grep -q '"debian-unstable"'; then echo "This package failed and has been disabled for CI using the 'x-ci-accept-failures' field." exit 69 fi fi exit $res " failed with exit status 20 Failed: Build failed