Building on ltsc2025-3
(from ocaml/opam:windows-server-mingw-ltsc2025-opam)
2026-03-09 04:34.10 ---> using "63e5ddb9687855d0a0c4c5e0088f813758807605401f3a88b07751088826ddff" from cache
C:/: (user (uid 1000) (gid 1000))
C:/: (env OPAMPRECISETRACKING 1)
C:/: (env OPAMUTF8 never)
C:/: (env OPAMEXTERNALSOLVER builtin-0install)
C:/: (env OPAMCRITERIA +removed)
C:/: (env CI true)
C:/: (env OPAM_HEALTH_CHECK_CI true)
C:/: (run (shell "ln -f /usr/local/bin/opam-dev.exe /usr/local/bin/opam.exe"))
2026-03-09 04:34.10 ---> using "eb751f1617949fccf400da87a349c508e73323f3f0e3482f2cce8c46fbcb6c21" from cache
C:/: (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 31db989bcaf14647d9889b8903120d6202ac37a8"))
2026-03-09 04:34.10 ---> using "ef58fca6f6db70f2bdfd85579892df7c50e047d2e179a3be59dcaa5c5a2d773c" from cache
C:/: (run (shell "rm -rf ~/.opam && opam init -ya --bare ~/opam-repository"))
User configuration:
Updating ~\.bashrc.
[NOTE] Make sure that ~/.bashrc is well sourced in your ~\.bash_profile.
Added 9 lines after line 1 in ~\.bashrc.
2026-03-09 04:34.10 ---> using "c700dfaf6f2da6800841bb961abfee8cd8858dee38ab51c0793b149f1795270d" from cache
C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam switch create --repositories=default 'mingw-5.4' '5.4.0'"))
<><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><>
Switch invariant: ["ocaml-base-compiler" {= "5.4.0"}]
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed arch-x86_64.1
-> installed base-bigarray.base
-> installed base-threads.base
-> installed base-unix.base
-> installed host-arch-x86_64.1
-> installed host-system-mingw.1
-> retrieved mingw-w64-shims.0.2.0 (cached)
-> retrieved flexdll.0.44 (https://github.com/ocaml/flexdll/archive/refs/tags/0.44.tar.gz)
-> installed flexdll.0.44
-> installed ocaml-options-vanilla.1
-> installed conf-mingw-w64-gcc-x86_64.1
-> installed ocaml-env-mingw64.1
-> installed system-mingw.1
-> retrieved ocaml-config.3 (2 extra sources)
-> retrieved ocaml-config.3 (2 extra sources)
-> installed mingw-w64-shims.0.2.0
-> retrieved ocaml-compiler.5.4.0 (https://github.com/ocaml/ocaml/releases/download/5.4.0/ocaml-5.4.0.tar.gz)
-> installed ocaml-compiler.5.4.0
-> installed ocaml-base-compiler.5.4.0
-> installed ocaml-config.3
-> installed ocaml.5.4.0
-> installed base-domains.base
-> installed base-effects.base
-> installed base-nnp.base
Done.
# To update the current shell environment, run: eval $(opam env --switch=mingw-5.4)
2026-03-09 04:34.10 ---> using "bde3e22405d3d4b8eb936b6a5924016abe757c72ef4284f806d0ffa633cf6608" from cache
C:/: (run (network host)
(shell "opam update --depexts"))
2026-03-09 04:34.10 ---> using "52107e23401ba5a409505a63e9d96ae2fb84390238c362f7049829fa18c5671f" from cache
C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam remove -y ocaml-option-no-compression.1\
\nopam install -vy ocaml-option-no-compression.1\
\nres=$?\
\nif [ $res = 31 ]; then\
\n if opam show -f x-ci-accept-failures: ocaml-option-no-compression.1 | grep -q 'ocaml/opam:windows-server-mingw-ltsc2025-opam'; 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"))
Nothing to do.
[NOTE] ocaml-option-no-compression.1 is not installed.
The following actions will be performed:
=== remove 3 packages
- remove host-system-mingw 1
- remove ocaml-env-mingw64 1
- remove system-mingw 1 [conflicts with ocaml-compiler]
=== recompile 7 packages
- recompile base-domains base [uses ocaml]
- recompile base-effects base [uses ocaml]
- recompile base-nnp base [uses base-domains]
- recompile ocaml 5.4.0 [uses ocaml-base-compiler]
- recompile ocaml-base-compiler 5.4.0 [uses ocaml-compiler]
- recompile ocaml-compiler 5.4.0 [uses ocaml-option-no-compression]
- recompile ocaml-config 3 [uses ocaml-base-compiler]
=== install 7 packages
- install conf-msvc64 1 [required by ocaml-env-msvc64]
- install host-system-msvc 1
- install msvs-detect 0.8.0 [required by conf-msvc64]
- install ocaml-env-msvc64 1 [required by system-msvc]
- install ocaml-option-no-compression 1
- install system-msvc 1 [required by ocaml-compiler]
- install winpthreads 20240209-1 [required by ocaml-compiler]
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> removed host-system-mingw.1
Processing 7/52: [msvs-detect.0.8.0: extract]
Processing 8/52: [msvs-detect.0.8.0: extract]
Processing 9/52: [msvs-detect.0.8.0: extract]
Processing 10/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract]
-> retrieved ocaml-config.3 (cached)
Processing 11/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract]
Processing 12/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract]
Processing 13/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract]
Processing 14/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract]
Processing 15/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
Processing 16/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
Processing 17/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
-> installed host-system-msvc.1
Processing 18/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
-> installed ocaml-option-no-compression.1
Processing 19/52: [msvs-detect.0.8.0: extract] [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
-> retrieved msvs-detect.0.8.0 (cached)
Processing 19/52: [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
Processing 20/52: [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
-> installed msvs-detect.0.8.0
Processing 21/52: [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract]
Processing 22/52: [ocaml-compiler.5.4.0: extract] [winpthreads.20240209-1: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> retrieved winpthreads.20240209-1 (cached)
Processing 22/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
Processing 23/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed base-effects.base
Processing 24/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed base-nnp.base
Processing 25/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed base-domains.base
Processing 26/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed ocaml.5.4.0
Processing 27/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed ocaml-config.3
Processing 28/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> removed ocaml-base-compiler.5.4.0
Processing 29/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
-> installed winpthreads.20240209-1
Processing 30/52: [ocaml-compiler.5.4.0: extract] [conf-msvc64: bash C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam]
+ C:\cygwin64\bin\bash.exe "C:\\opam\\.opam\\mingw-5.4\\share\\msvs-detect\\msvs-opam" "x86_64" "conf-msvc64" "C:\\opam\\.opam\\mingw-5.4\\share\\msvs-detect\\msvs-detect" (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-msvc64.1)
[ERROR] The compilation of conf-msvc64.1 failed at "bash C:\\opam\\.opam\\mingw-5.4\\share\\msvs-detect\\msvs-opam x86_64 conf-msvc64 C:\\opam\\.opam\\mingw-5.4\\share\\msvs-detect\\msvs-detect".
- No compatible Visual Studio installation was found!
- Please install Visual Studio with at least the x64/x86 build tools
- and Windows SDK packages. See https://visualstudio.microsoft.com/downloads/
Processing 30/52: [ocaml-compiler.5.4.0: extract]
Processing 31/52: [ocaml-compiler.5.4.0: extract]
Processing 32/52: [ocaml-compiler.5.4.0: extract]
Processing 33/52: [ocaml-compiler.5.4.0: extract]
-> retrieved ocaml-compiler.5.4.0 (cached)
-> removed ocaml-compiler.5.4.0
-> removed system-mingw.1
-> removed ocaml-env-mingw64.1
#=== ERROR while compiling conf-msvc64.1 ======================================#
# context 2.5.0 | win32/x86_64 | | git+file://C:/cygwin64/home/opam/opam-repository
# path C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-msvc64.1
# command C:\cygwin64\bin\bash.exe C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-opam x86_64 conf-msvc64 C:\opam\.opam\mingw-5.4\share\msvs-detect\msvs-detect
# exit-code 1
# env-file C:\opam\.opam\log\conf-msvc64-8156-d1e655.env
# output-file C:\opam\.opam\log\conf-msvc64-8156-d1e655.out
### output ###
# No compatible Visual Studio installation was found!
# Please install Visual Studio with at least the x64/x86 build tools
# and Windows SDK packages. See https://visualstudio.microsoft.com/downloads/
<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions were aborted
| - install base-domains base
| - install base-effects base
| - install base-nnp base
| - install ocaml 5.4.0
| - install ocaml-base-compiler 5.4.0
| - install ocaml-compiler 5.4.0
| - install ocaml-config 3
| - install ocaml-env-msvc64 1
| - install system-msvc 1
+-
+- The following actions failed
| - build conf-msvc64 1
+-
+- The following changes have been performed (the rest was aborted)
| - remove base-domains base
| - remove base-effects base
| - remove base-nnp base
| - remove host-system-mingw 1
| - remove ocaml 5.4.0
| - remove ocaml-base-compiler 5.4.0
| - remove ocaml-compiler 5.4.0
| - remove ocaml-config 3
| - remove ocaml-env-mingw64 1
| - remove system-mingw 1
| - install host-system-msvc 1
| - install msvs-detect 0.8.0
| - install ocaml-option-no-compression 1
| - install winpthreads 20240209-1
+-
<><> conf-msvc64.1 troubleshooting ><><><><><><><><><><><><><><><><><><><><><><>
=> A suitable Visual Studio installation could not be found for x86_64.
Visual Studio can be obtained from https://visualstudio.microsoft.com
# To update the current shell environment, run: eval $(opam env)
The former state can be restored with:
C:\cygwin64\usr\local\bin\opam.exe switch import "C:\\opam\\.opam\\mingw-5.4\\.opam-switch\\backup\\state-20260309043438.export"
Or you can retry to install your package selection with:
C:\cygwin64\usr\local\bin\opam.exe install --restore
'C:\cygwin64\usr\local\bin\opam.exe install -vy ocaml-option-no-compression.1' failed.
"C:\cygwin64\bin\bash.exe" "-lc" "opam remove -y ocaml-option-no-compression.1
opam install -vy ocaml-option-no-compression.1
res=$?
if [ $res = 31 ]; then
if opam show -f x-ci-accept-failures: ocaml-option-no-compression.1 | grep -q 'ocaml/opam:windows-server-mingw-ltsc2025-opam'; 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 31
Failed: Build failed
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