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Building on x86-bm-3.ocamllabs.io

(from ocaml/opam:debian-unstable)
WARNING: Error loading config file: .dockercfg: $HOME is not defined
2021-09-03 15:04.20 ---> 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"))
2021-09-03 15:04.20 ---> using "4d29eb3e0b7cd69a97ed90837671d5ca38aa41e2fb94346298af500378eca6fa" from cache

/: (run (network host)
        (shell "rm -rf ~/opam-repository && git clone -q 'git://github.com/ocaml/opam-repository.git' ~/opam-repository && git -C ~/opam-repository checkout -q 8fc7af65ccb8f3b3709bf02b749ac492e6700b59"))
2021-09-03 15:04.20 ---> using "eb095db6df41eeadc708604343f7b0ce0892db9136dac67a38046f57271c5802" 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.

2021-09-03 15:04.20 ---> using "d245c9af6f86b2b97434d338a3fbb8270425ab7dc6ad1b5451665adc9698eabf" from cache

/: (run (network host)
        (shell "git clone -q 'git://github.com/ocaml/ocaml-beta-repository.git' ~/'beta' && git -C ~/'beta' checkout -q 79aeeadd813bdae424ab53f882f08bee0a4e0b89"))
2021-09-03 15:04.20 ---> using "20d9850dcecd0523d6eddecad814e9bbd93882334348605bfa6e15ffd8f5ced5" from cache

/: (run (shell "opam repository add --dont-select 'beta' ~/'beta'"))
[beta] Initialised
2021-09-03 15:04.20 ---> using "6f8879c5099d2146b69bdcec3874fd111cad6c5c42ac63d5f9aa72a228fd8ee8" from cache

/: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
        (network host)
        (shell "opam switch create --repositories=beta,default 4.09.1"))

<><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><>
Switch invariant: ["ocaml-base-compiler" {= "4.09.1"} | "ocaml-system" {= "4.09.1"}]

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed base-bigarray.base
-> installed base-threads.base
-> installed base-unix.base
-> retrieved ocaml-base-compiler.4.09.1  (cached)
-> installed ocaml-base-compiler.4.09.1
-> installed ocaml-config.1
-> installed ocaml.4.09.1
Done.
# Run eval $(opam env --switch=4.09.1) to update the current shell environment
2021-09-03 15:04.20 ---> using "f7eb24fb60dbb2e2cea3f340c748d8f48715ffb8e525b45da3b56bfe3f312bcf" 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]
- Ign:2 http://deb.debian.org/debian unstable/main amd64 Packages.diff/Index
- Get:3 http://deb.debian.org/debian unstable/main amd64 Packages [8766 kB]
- Fetched 8994 kB in 2s (4776 kB/s)
- Reading package lists...
2021-09-03 15:04.20 ---> using "b112a285d5a4dddaa711d9dd630015f2fb5bb6d8c5e59fca3d0bd55f51cb91fe" from cache

/: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
        (network host)
        (shell  "\
               \nopam remove -y \"conf-glew.1\"\
               \nopam install -vy \"conf-glew.1\"\
               \nres=$?\
               \nif [ $res = 31 ]; then\
               \n    if opam show -f x-ci-accept-failures: \"conf-glew.1\" | 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"))
[NOTE] conf-glew.1 is not installed.

Nothing to do.
The following actions will be performed:
  - install conf-pkg-config 2 [required by conf-glew]
  - install conf-glew       1
===== 2 to install =====

The following system packages will first need to be installed:
    libglew-dev pkg-config

<><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><>
Let opam run your package manager to install the required system packages?
(answer 'n' for other options) [Y/n] y
+ /usr/bin/sudo "apt-get" "install" "-qq" "-yy" "libglew-dev" "pkg-config"
- debconf: delaying package configuration, since apt-utils is not installed
- Selecting previously unselected package libdrm-common.
- (Reading database ... 
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(Reading database ... 18039 files and directories currently installed.)
- Preparing to unpack .../00-libdrm-common_2.4.107-2_all.deb ...
- Unpacking libdrm-common (2.4.107-2) ...
- Selecting previously unselected package libdrm2:amd64.
- Preparing to unpack .../01-libdrm2_2.4.107-2_amd64.deb ...
- Unpacking libdrm2:amd64 (2.4.107-2) ...
- Selecting previously unselected package libdrm-amdgpu1:amd64.
- Preparing to unpack .../02-libdrm-amdgpu1_2.4.107-2_amd64.deb ...
- Unpacking libdrm-amdgpu1:amd64 (2.4.107-2) ...
- Selecting previously unselected package libpciaccess0:amd64.
- Preparing to unpack .../03-libpciaccess0_0.16-1_amd64.deb ...
- Unpacking libpciaccess0:amd64 (0.16-1) ...
- Selecting previously unselected package libdrm-intel1:amd64.
- Preparing to unpack .../04-libdrm-intel1_2.4.107-2_amd64.deb ...
- Unpacking libdrm-intel1:amd64 (2.4.107-2) ...
- Selecting previously unselected package libdrm-nouveau2:amd64.
- Preparing to unpack .../05-libdrm-nouveau2_2.4.107-2_amd64.deb ...
- Unpacking libdrm-nouveau2:amd64 (2.4.107-2) ...
- Selecting previously unselected package libdrm-radeon1:amd64.
- Preparing to unpack .../06-libdrm-radeon1_2.4.107-2_amd64.deb ...
- Unpacking libdrm-radeon1:amd64 (2.4.107-2) ...
- Selecting previously unselected package libelf1:amd64.
- Preparing to unpack .../07-libelf1_0.185-2_amd64.deb ...
- Unpacking libelf1:amd64 (0.185-2) ...
- Selecting previously unselected package libglapi-mesa:amd64.
- Preparing to unpack .../08-libglapi-mesa_21.2.1-2_amd64.deb ...
- Unpacking libglapi-mesa:amd64 (21.2.1-2) ...
- Selecting previously unselected package libicu67:amd64.
- Preparing to unpack .../09-libicu67_67.1-7_amd64.deb ...
- Unpacking libicu67:amd64 (67.1-7) ...
- Selecting previously unselected package libxml2:amd64.
- Preparing to unpack .../10-libxml2_2.9.12+dfsg-3_amd64.deb ...
- Unpacking libxml2:amd64 (2.9.12+dfsg-3) ...
- Selecting previously unselected package libz3-4:amd64.
- Preparing to unpack .../11-libz3-4_4.8.10-1_amd64.deb ...
- Unpacking libz3-4:amd64 (4.8.10-1) ...
- Selecting previously unselected package libllvm12:amd64.
- Preparing to unpack .../12-libllvm12_1%3a12.0.1-7_amd64.deb ...
- Unpacking libllvm12:amd64 (1:12.0.1-7) ...
- Selecting previously unselected package libsensors-config.
- Preparing to unpack .../13-libsensors-config_1%3a3.6.0-7_all.deb ...
- Unpacking libsensors-config (1:3.6.0-7) ...
- Selecting previously unselected package libsensors5:amd64.
- Preparing to unpack .../14-libsensors5_1%3a3.6.0-7_amd64.deb ...
- Unpacking libsensors5:amd64 (1:3.6.0-7) ...
- Selecting previously unselected package libvulkan1:amd64.
- Preparing to unpack .../15-libvulkan1_1.2.182.0-2_amd64.deb ...
- Unpacking libvulkan1:amd64 (1.2.182.0-2) ...
- Selecting previously unselected package libgl1-mesa-dri:amd64.
- Preparing to unpack .../16-libgl1-mesa-dri_21.2.1-2_amd64.deb ...
- Unpacking libgl1-mesa-dri:amd64 (21.2.1-2) ...
- Selecting previously unselected package libglvnd0:amd64.
- Preparing to unpack .../17-libglvnd0_1.3.4-1_amd64.deb ...
- Unpacking libglvnd0:amd64 (1.3.4-1) ...
- Selecting previously unselected package libwayland-server0:amd64.
- Preparing to unpack .../18-libwayland-server0_1.19.0-2_amd64.deb ...
- Unpacking libwayland-server0:amd64 (1.19.0-2) ...
- Selecting previously unselected package libgbm1:amd64.
- Preparing to unpack .../19-libgbm1_21.2.1-2_amd64.deb ...
- Unpacking libgbm1:amd64 (21.2.1-2) ...
- Selecting previously unselected package libwayland-client0:amd64.
- Preparing to unpack .../20-libwayland-client0_1.19.0-2_amd64.deb ...
- Unpacking libwayland-client0:amd64 (1.19.0-2) ...
- Selecting previously unselected package libx11-xcb1:amd64.
- Preparing to unpack .../21-libx11-xcb1_2%3a1.7.2-1_amd64.deb ...
- Unpacking libx11-xcb1:amd64 (2:1.7.2-1) ...
- Selecting previously unselected package libxcb-dri2-0:amd64.
- Preparing to unpack .../22-libxcb-dri2-0_1.14-3_amd64.deb ...
- Unpacking libxcb-dri2-0:amd64 (1.14-3) ...
- Selecting previously unselected package libxcb-dri3-0:amd64.
- Preparing to unpack .../23-libxcb-dri3-0_1.14-3_amd64.deb ...
- Unpacking libxcb-dri3-0:amd64 (1.14-3) ...
- Selecting previously unselected package libxcb-present0:amd64.
- Preparing to unpack .../24-libxcb-present0_1.14-3_amd64.deb ...
- Unpacking libxcb-present0:amd64 (1.14-3) ...
- Selecting previously unselected package libxcb-sync1:amd64.
- Preparing to unpack .../25-libxcb-sync1_1.14-3_amd64.deb ...
- Unpacking libxcb-sync1:amd64 (1.14-3) ...
- Selecting previously unselected package libxcb-xfixes0:amd64.
- Preparing to unpack .../26-libxcb-xfixes0_1.14-3_amd64.deb ...
- Unpacking libxcb-xfixes0:amd64 (1.14-3) ...
- Selecting previously unselected package libxshmfence1:amd64.
- Preparing to unpack .../27-libxshmfence1_1.3-1_amd64.deb ...
- Unpacking libxshmfence1:amd64 (1.3-1) ...
- Selecting previously unselected package libegl-mesa0:amd64.
- Preparing to unpack .../28-libegl-mesa0_21.2.1-2_amd64.deb ...
- Unpacking libegl-mesa0:amd64 (21.2.1-2) ...
- Selecting previously unselected package libegl1:amd64.
- Preparing to unpack .../29-libegl1_1.3.4-1_amd64.deb ...
- Unpacking libegl1:amd64 (1.3.4-1) ...
- Selecting previously unselected package libxcb-glx0:amd64.
- Preparing to unpack .../30-libxcb-glx0_1.14-3_amd64.deb ...
- Unpacking libxcb-glx0:amd64 (1.14-3) ...
- Selecting previously unselected package libxcb-shm0:amd64.
- Preparing to unpack .../31-libxcb-shm0_1.14-3_amd64.deb ...
- Unpacking libxcb-shm0:amd64 (1.14-3) ...
- Selecting previously unselected package libxfixes3:amd64.
- Preparing to unpack .../32-libxfixes3_1%3a5.0.3-2_amd64.deb ...
- Unpacking libxfixes3:amd64 (1:5.0.3-2) ...
- Selecting previously unselected package libxxf86vm1:amd64.
- Preparing to unpack .../33-libxxf86vm1_1%3a1.1.4-1+b2_amd64.deb ...
- Unpacking libxxf86vm1:amd64 (1:1.1.4-1+b2) ...
- Selecting previously unselected package libglx-mesa0:amd64.
- Preparing to unpack .../34-libglx-mesa0_21.2.1-2_amd64.deb ...
- Unpacking libglx-mesa0:amd64 (21.2.1-2) ...
- Selecting previously unselected package libglx0:amd64.
- Preparing to unpack .../35-libglx0_1.3.4-1_amd64.deb ...
- Unpacking libglx0:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgl1:amd64.
- Preparing to unpack .../36-libgl1_1.3.4-1_amd64.deb ...
- Unpacking libgl1:amd64 (1.3.4-1) ...
- Selecting previously unselected package libglx-dev:amd64.
- Preparing to unpack .../37-libglx-dev_1.3.4-1_amd64.deb ...
- Unpacking libglx-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgl-dev:amd64.
- Preparing to unpack .../38-libgl-dev_1.3.4-1_amd64.deb ...
- Unpacking libgl-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libegl-dev:amd64.
- Preparing to unpack .../39-libegl-dev_1.3.4-1_amd64.deb ...
- Unpacking libegl-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libglvnd-core-dev:amd64.
- Preparing to unpack .../40-libglvnd-core-dev_1.3.4-1_amd64.deb ...
- Unpacking libglvnd-core-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgles1:amd64.
- Preparing to unpack .../41-libgles1_1.3.4-1_amd64.deb ...
- Unpacking libgles1:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgles2:amd64.
- Preparing to unpack .../42-libgles2_1.3.4-1_amd64.deb ...
- Unpacking libgles2:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgles-dev:amd64.
- Preparing to unpack .../43-libgles-dev_1.3.4-1_amd64.deb ...
- Unpacking libgles-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libopengl0:amd64.
- Preparing to unpack .../44-libopengl0_1.3.4-1_amd64.deb ...
- Unpacking libopengl0:amd64 (1.3.4-1) ...
- Selecting previously unselected package libopengl-dev:amd64.
- Preparing to unpack .../45-libopengl-dev_1.3.4-1_amd64.deb ...
- Unpacking libopengl-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libglvnd-dev:amd64.
- Preparing to unpack .../46-libglvnd-dev_1.3.4-1_amd64.deb ...
- Unpacking libglvnd-dev:amd64 (1.3.4-1) ...
- Selecting previously unselected package libgl1-mesa-dev:amd64.
- Preparing to unpack .../47-libgl1-mesa-dev_21.2.1-2_amd64.deb ...
- Unpacking libgl1-mesa-dev:amd64 (21.2.1-2) ...
- Selecting previously unselected package libglew2.1:amd64.
- Preparing to unpack .../48-libglew2.1_2.1.0-4+b1_amd64.deb ...
- Unpacking libglew2.1:amd64 (2.1.0-4+b1) ...
- Selecting previously unselected package libglu1-mesa:amd64.
- Preparing to unpack .../49-libglu1-mesa_9.0.1-1_amd64.deb ...
- Unpacking libglu1-mesa:amd64 (9.0.1-1) ...
- Selecting previously unselected package libglu1-mesa-dev:amd64.
- Preparing to unpack .../50-libglu1-mesa-dev_9.0.1-1_amd64.deb ...
- Unpacking libglu1-mesa-dev:amd64 (9.0.1-1) ...
- Selecting previously unselected package libglew-dev:amd64.
- Preparing to unpack .../51-libglew-dev_2.1.0-4+b1_amd64.deb ...
- Unpacking libglew-dev:amd64 (2.1.0-4+b1) ...
- Selecting previously unselected package libglib2.0-0:amd64.
- Preparing to unpack .../52-libglib2.0-0_2.68.4-1_amd64.deb ...
- Unpacking libglib2.0-0:amd64 (2.68.4-1) ...
- Selecting previously unselected package libglib2.0-data.
- Preparing to unpack .../53-libglib2.0-data_2.68.4-1_all.deb ...
- Unpacking libglib2.0-data (2.68.4-1) ...
- Selecting previously unselected package libxcb-randr0:amd64.
- Preparing to unpack .../54-libxcb-randr0_1.14-3_amd64.deb ...
- Unpacking libxcb-randr0:amd64 (1.14-3) ...
- Selecting previously unselected package mesa-vulkan-drivers:amd64.
- Preparing to unpack .../55-mesa-vulkan-drivers_21.2.1-2_amd64.deb ...
- Unpacking mesa-vulkan-drivers:amd64 (21.2.1-2) ...
- Selecting previously unselected package pkg-config.
- Preparing to unpack .../56-pkg-config_0.29.2-1_amd64.deb ...
- Unpacking pkg-config (0.29.2-1) ...
- Selecting previously unselected package shared-mime-info.
- Preparing to unpack .../57-shared-mime-info_2.0-1_amd64.deb ...
- Unpacking shared-mime-info (2.0-1) ...
- Selecting previously unselected package xdg-user-dirs.
- Preparing to unpack .../58-xdg-user-dirs_0.17-2_amd64.deb ...
- Unpacking xdg-user-dirs (0.17-2) ...
- Setting up libxcb-dri3-0:amd64 (1.14-3) ...
- Setting up libwayland-server0:amd64 (1.19.0-2) ...
- Setting up libx11-xcb1:amd64 (2:1.7.2-1) ...
- Setting up libpciaccess0:amd64 (0.16-1) ...
- Setting up libxcb-xfixes0:amd64 (1.14-3) ...
- Setting up libglvnd-core-dev:amd64 (1.3.4-1) ...
- Setting up libicu67:amd64 (67.1-7) ...
- Setting up xdg-user-dirs (0.17-2) ...
- Setting up libglib2.0-0:amd64 (2.68.4-1) ...
- No schema files found: doing nothing.
- Setting up libglvnd0:amd64 (1.3.4-1) ...
- Setting up libxcb-glx0:amd64 (1.14-3) ...
- Setting up libsensors-config (1:3.6.0-7) ...
- Setting up libxcb-shm0:amd64 (1.14-3) ...
- Setting up libopengl0:amd64 (1.3.4-1) ...
- Setting up libxxf86vm1:amd64 (1:1.1.4-1+b2) ...
- Setting up libxcb-present0:amd64 (1.14-3) ...
- Setting up libz3-4:amd64 (4.8.10-1) ...
- Setting up libglib2.0-data (2.68.4-1) ...
- Setting up libgles2:amd64 (1.3.4-1) ...
- Setting up libxfixes3:amd64 (1:5.0.3-2) ...
- Setting up libxcb-sync1:amd64 (1.14-3) ...
- Setting up libgles1:amd64 (1.3.4-1) ...
- Setting up pkg-config (0.29.2-1) ...
- Setting up libsensors5:amd64 (1:3.6.0-7) ...
- Setting up libglapi-mesa:amd64 (21.2.1-2) ...
- Setting up libvulkan1:amd64 (1.2.182.0-2) ...
- Setting up libxcb-dri2-0:amd64 (1.14-3) ...
- Setting up libxshmfence1:amd64 (1.3-1) ...
- Setting up libxcb-randr0:amd64 (1.14-3) ...
- Setting up libopengl-dev:amd64 (1.3.4-1) ...
- Setting up libdrm-common (2.4.107-2) ...
- Setting up libelf1:amd64 (0.185-2) ...
- Setting up libxml2:amd64 (2.9.12+dfsg-3) ...
- Setting up libwayland-client0:amd64 (1.19.0-2) ...
- Setting up libllvm12:amd64 (1:12.0.1-7) ...
- Setting up shared-mime-info (2.0-1) ...
- Setting up libdrm2:amd64 (2.4.107-2) ...
- Setting up libdrm-amdgpu1:amd64 (2.4.107-2) ...
- Setting up mesa-vulkan-drivers:amd64 (21.2.1-2) ...
- Setting up libdrm-nouveau2:amd64 (2.4.107-2) ...
- Setting up libgbm1:amd64 (21.2.1-2) ...
- Setting up libdrm-radeon1:amd64 (2.4.107-2) ...
- Setting up libdrm-intel1:amd64 (2.4.107-2) ...
- Setting up libgl1-mesa-dri:amd64 (21.2.1-2) ...
- Setting up libegl-mesa0:amd64 (21.2.1-2) ...
- Setting up libegl1:amd64 (1.3.4-1) ...
- Setting up libglx-mesa0:amd64 (21.2.1-2) ...
- Setting up libglx0:amd64 (1.3.4-1) ...
- Setting up libgl1:amd64 (1.3.4-1) ...
- Setting up libglew2.1:amd64 (2.1.0-4+b1) ...
- Setting up libglx-dev:amd64 (1.3.4-1) ...
- Setting up libglu1-mesa:amd64 (9.0.1-1) ...
- Setting up libgl-dev:amd64 (1.3.4-1) ...
- Setting up libegl-dev:amd64 (1.3.4-1) ...
- Setting up libglu1-mesa-dev:amd64 (9.0.1-1) ...
- Setting up libgles-dev:amd64 (1.3.4-1) ...
- Setting up libglvnd-dev:amd64 (1.3.4-1) ...
- Setting up libglew-dev:amd64 (2.1.0-4+b1) ...
- Setting up libgl1-mesa-dev:amd64 (21.2.1-2) ...
- Processing triggers for libc-bin (2.31-15) ...

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Processing  3/6: [conf-pkg-config: pkg-config]
+ /home/opam/.opam/opam-init/hooks/sandbox.sh "build" "pkg-config" "--help" (CWD=/home/opam/.opam/4.09.1/.opam-switch/build/conf-pkg-config.2)
- Usage:
-   pkg-config [OPTION?]
- 
- Help Options:
-   -h, --help                              Show help options
- 
- Application Options:
-   --version                               output version of pkg-config
-   --modversion                            output version for package
-   --atleast-pkgconfig-version=VERSION     require given version of pkg-config
-   --libs                                  output all linker flags
-   --static                                output linker flags for static linking
-   --short-errors                          print short errors
-   --libs-only-l                           output -l flags
-   --libs-only-other                       output other libs (e.g. -pthread)
-   --libs-only-L                           output -L flags
-   --cflags                                output all pre-processor and compiler flags
-   --cflags-only-I                         output -I flags
-   --cflags-only-other                     output cflags not covered by the cflags-only-I option
-   --variable=NAME                         get the value of variable named NAME
-   --define-variable=NAME=VALUE            set variable NAME to VALUE
-   --exists                                return 0 if the module(s) exist
-   --print-variables                       output list of variables defined by the module
-   --uninstalled                           return 0 if the uninstalled version of one or more module(s) or their dependencies will be used
-   --atleast-version=VERSION               return 0 if the module is at least version VERSION
-   --exact-version=VERSION                 return 0 if the module is at exactly version VERSION
-   --max-version=VERSION                   return 0 if the module is at no newer than version VERSION
-   --list-all                              list all known packages
-   --debug                                 show verbose debug information
-   --print-errors                          show verbose information about missing or conflicting packages (default unless --exists or --atleast/exact/max-version given on the command line)
-   --silence-errors                        be silent about errors (default when --exists or --atleast/exact/max-version given on the command line)
-   --errors-to-stdout                      print errors from --print-errors to stdout not stderr
-   --print-provides                        print which packages the package provides
-   --print-requires                        print which packages the package requires
-   --print-requires-private                print which packages the package requires for static linking
-   --validate                              validate a package's .pc file
-   --define-prefix                         try to override the value of prefix for each .pc file found with a guesstimated value based on the location of the .pc file
-   --dont-define-prefix                    don't try to override the value of prefix for each .pc file found with a guesstimated value based on the location of the .pc file
-   --prefix-variable=PREFIX                set the name of the variable that pkg-config automatically sets
- 
-> compiled  conf-pkg-config.2
Processing  4/6: [conf-pkg-config: mkdir]
+ /home/opam/.opam/opam-init/hooks/sandbox.sh "install" "mkdir" "-p" "/home/opam/.opam/4.09.1/lib/pkgconfig" (CWD=/home/opam/.opam/4.09.1/.opam-switch/build/conf-pkg-config.2)
-> installed conf-pkg-config.2
Processing  5/6: [conf-glew: pkg-config glew]
+ /home/opam/.opam/opam-init/hooks/sandbox.sh "build" "pkg-config" "--print-errors" "--exists" "glew" (CWD=/home/opam/.opam/4.09.1/.opam-switch/build/conf-glew.1)
-> compiled  conf-glew.1
-> installed conf-glew.1
Done.
# Run eval $(opam env) to update the current shell environment
2021-09-03 15:05.33 ---> saved as "ec7fd25f35b6a842d989eee2c98f73bbb79f80f53516231169b4b96e3d4c1fc0"
Job succeeded