Building on ltsc2025-2
(from ocaml/opam:windows-server-mingw-ltsc2025-opam)
2026-03-29 07:16.33 ---> 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"))
2026-03-29 07:16.33 ---> 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 65664dc5b276cda6cf6908fce5d2f7df2d434246"))
2026-03-29 07:16.33 ---> using "a1e705b8eccfc593b4fbc230ee7712cb183e42874d3459594f007e83ba548a84" 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.
2026-03-29 07:16.33 ---> using "94b92ded6f6a914e0c8cf60eb04427886c3a380cc0b69761979305cc893fbb67" 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 flexdll.0.44 (cached)
-> retrieved ocaml-config.3 (cached)
-> installed flexdll.0.44
-> installed ocaml-options-vanilla.1
-> retrieved mingw-w64-shims.0.2.0 (cached)
-> installed conf-mingw-w64-gcc-x86_64.1
-> installed ocaml-env-mingw64.1
-> installed system-mingw.1
-> installed mingw-w64-shims.0.2.0
-> retrieved ocaml-compiler.5.4.0 (cached)
-> 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 $(opam env --switch=mingw-5.4)
2026-03-29 07:16.33 ---> using "fef9a386bcc007a13a835243258296c6fba53ee56a7f3e7d366a20891bb1dbf6" from cache
C:/: (run (network host)
(shell "opam update --depexts"))
2026-03-29 07:16.33 ---> using "c1b87f3ba265cc602c17b1d72cdbd101c4febb3b928180288e5808ce3e9dbec0" from cache
C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam remove -y fat-filesystem.0.15.1\
\nopam install -vy fat-filesystem.0.15.1\
\nres=$?\
\nif [ $res = 31 ]; then\
\n if opam show -f x-ci-accept-failures: fat-filesystem.0.15.1 | 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] fat-filesystem.0.15.1 is not installed.
The following actions will be performed:
=== recompile 1 package
- recompile mingw-w64-shims 0.2.0 [uses conf-pkg-config]
=== install 38 packages
- install angstrom 0.16.1 [required by uri]
- install astring 0.8.5 [required by fat-filesystem]
- install base-bytes base [required by ocplib-endian]
- install bigstringaf 0.10.0 [required by angstrom]
- install cmdliner 2.1.0 [required by fat-filesystem]
- install conf-pkg-config 4 [required by io-page]
- install cppo 1.8.0 [required by lwt]
- install csexp 1.5.2 [required by dune-configurator]
- install cstruct 6.2.0 [required by fat-filesystem]
- install cstruct-lwt 6.2.0 [required by mirage-block-unix]
- install dune 3.21.1 [required by fat-filesystem]
- install dune-configurator 3.21.1 [required by lwt]
- install fat-filesystem 0.15.1
- install fmt 0.11.0 [required by fat-filesystem]
- install io-page 3.0.0 [required by fat-filesystem]
- install logs 0.10.0 [required by mirage-block-unix]
- install lwt 6.1.1 [required by fat-filesystem]
- install mirage-block 3.0.2 [required by fat-filesystem]
- install mirage-block-unix 2.14.2 [required by fat-filesystem]
- install mirage-kv 4.0.1 [required by fat-filesystem]
- install num 1.6 [required by sexplib]
- install ocaml-compiler-libs v0.17.0 [required by ppxlib]
- install ocaml-syntax-shims 1.0.0 [required by angstrom]
- install ocamlbuild 0.16.1 [required by astring]
- install ocamlfind 1.9.8 [required by astring]
- install ocplib-endian 1.2 [required by lwt]
- install parsexp v0.17.0 [required by sexplib]
- install ppx_cstruct 6.2.0 [required by fat-filesystem]
- install ppx_derivers 1.2.1 [required by ppxlib]
- install ppxlib 0.38.0~5.5preview [required by ppx_cstruct]
- install re 1.14.0 [required by fat-filesystem]
- install rresult 0.7.0 [required by fat-filesystem]
- install sexplib v0.17.0 [required by ppx_cstruct]
- install sexplib0 v0.17.0 [required by ppxlib, sexplib]
- install stdlib-shims 0.3.0 [required by ppxlib]
- install stringext 1.6.0 [required by uri]
- install topkg 1.1.1 [required by astring]
- install uri 4.4.0 [required by mirage-block-unix]
The following system packages will first need to be installed:
pkgconf
<><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><>
opam believes some required external dependencies are missing. opam can:
> 1. Run C:\opam\.opam\.cygwin\setup-x86_64.exe to install them (may need root/sudo access)
2. Display the recommended C:\opam\.opam\.cygwin\setup-x86_64.exe command and wait while you run it manually (e.g. in another terminal)
3. Continue anyway, and, upon success, permanently register that this external dependency is present, but not detectable
4. Abort the installation
[1/2/3/4] 4
[NOTE] You can retry with '--assume-depexts' to skip this check, or run 'opam option depext=false' to permanently disable handling of system packages.
Running the system package manager non-interactively requires '--confirm-level=unsafe-yes'.
'C:\cygwin64\usr\local\bin\opam.exe install -vy fat-filesystem.0.15.1' failed.
"C:\cygwin64\bin\bash.exe" "-lc" "opam remove -y fat-filesystem.0.15.1
opam install -vy fat-filesystem.0.15.1
res=$?
if [ $res = 31 ]; then
if opam show -f x-ci-accept-failures: fat-filesystem.0.15.1 | 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 10
Failed: Build failed
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