windows-server-mingw-ltsc2025-5.4_opam-2.5

2026-06-04 00:45.45: New job: test mirage/Zarith https://github.com/mirage/Zarith.git#refs/heads/zarith-1.14 (df8969d9bb95cffca13e31a615189ab27ada0684) (windows-x86_64:windows-server-mingw-ltsc2025-5.4_opam-2.5)
Base: ocaml/opam:windows-server-mingw-ltsc2025-ocaml-5.4@sha256:6b6bcfd98b4600d5c8de1feffe95b566f1c337d961157c2fea3ccf3e3c5939bd
Opam project build


To reproduce locally:


git clone --recursive "https://github.com/mirage/Zarith.git" -b "zarith-1.14" && cd "Zarith" && git reset --hard df8969d9
cat > Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:windows-server-mingw-ltsc2025-ocaml-5.4@sha256:6b6bcfd98b4600d5c8de1feffe95b566f1c337d961157c2fea3ccf3e3c5939bd
# windows-server-mingw-ltsc2025-5.4_opam-2.5
USER 1000:1000
ENV CLICOLOR_FORCE="1"
ENV OPAMCOLOR="always"
RUN ln -f /usr/local/bin/opam-2.5 /usr/local/bin/opam
RUN cd ~/opam-repository && (git cat-file -e a28353a4e21fc21cac49f64f1d99064fc11ce3f9 || git fetch origin master) && git reset -q --hard a28353a4e21fc21cac49f64f1d99064fc11ce3f9 && git log --no-decorate -n1 --oneline
RUN opam init --reinit -ni
RUN uname -rs && opam exec -- ocaml -version && opam --version
RUN opam update -u
COPY --chown=1000:1000 zarith.opam /cygwin64/home/opam/src/./
RUN opam pin add -yn zarith.dev '/cygwin64/home/opam/src/./'
RUN echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'
ENV DEPS="arch-x86_64.1 base-bigarray.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base conf-m4.1 conf-mingw-w64-gcc-x86_64.1 dune.3.23.1 flexdll.0.44 gmp.6.3.0 host-arch-x86_64.1 host-system-mingw.1 mingw-w64-shims.0.2.0 ocaml.5.4.1 ocaml-base-compiler.5.4.1 ocaml-compiler.5.4.1 ocaml-config.3 ocaml-env-mingw64.1 ocaml-options-vanilla.1 system-mingw.1"
ENV CI="true"
ENV OCAMLCI="true"
RUN opam update --depexts && opam install --cli=2.5 --depext-only -y zarith.dev $DEPS
RUN opam install $DEPS
COPY --chown=1000:1000 . /cygwin64/home/opam/src
RUN cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _build


END-OF-DOCKERFILE
docker build .
END-REPRO-BLOCK


2026-06-04 00:45.45: Using cache hint "mirage/Zarith-ocaml/opam:windows-server-mingw-ltsc2025-ocaml-5.4@sha256:6b6bcfd98b4600d5c8de1feffe95b566f1c337d961157c2fea3ccf3e3c5939bd-windows-server-mingw-ltsc2025-5.4_opam-2.5-8f6640ffc4f242018e1d91533e8c4dfa"
2026-06-04 00:45.45: Using OBuilder spec:
((from ocaml/opam:windows-server-mingw-ltsc2025-ocaml-5.4@sha256:6b6bcfd98b4600d5c8de1feffe95b566f1c337d961157c2fea3ccf3e3c5939bd)
(comment windows-server-mingw-ltsc2025-5.4_opam-2.5)
(user (uid 1000) (gid 1000))
(env CLICOLOR_FORCE 1)
(env OPAMCOLOR always)
(run (shell "ln -f /usr/local/bin/opam-2.5 /usr/local/bin/opam"))
(run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "cd ~/opam-repository && (git cat-file -e a28353a4e21fc21cac49f64f1d99064fc11ce3f9 || git fetch origin master) && git reset -q --hard a28353a4e21fc21cac49f64f1d99064fc11ce3f9 && git log --no-decorate -n1 --oneline"))
(run (shell "opam init --reinit -ni"))
(run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
(run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam update -u"))
(copy (src zarith.opam) (dst /cygwin64/home/opam/src/./))
(run (network host)
(shell "opam pin add -yn zarith.dev '/cygwin64/home/opam/src/./'"))
(run (shell "echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'"))
(env DEPS "arch-x86_64.1 base-bigarray.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base conf-m4.1 conf-mingw-w64-gcc-x86_64.1 dune.3.23.1 flexdll.0.44 gmp.6.3.0 host-arch-x86_64.1 host-system-mingw.1 mingw-w64-shims.0.2.0 ocaml.5.4.1 ocaml-base-compiler.5.4.1 ocaml-compiler.5.4.1 ocaml-config.3 ocaml-env-mingw64.1 ocaml-options-vanilla.1 system-mingw.1")
(env CI true)
(env OCAMLCI true)
(run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam update --depexts && opam install --cli=2.5 --depext-only -y zarith.dev $DEPS"))
(run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam install $DEPS"))
(copy (src .) (dst /cygwin64/home/opam/src))
(run (shell "cd /home/opam/src && opam exec -- dune build @install @check @runtest && rm -rf _build"))
)


2026-06-04 00:45.45: Waiting for resource in pool OCluster
2026-06-04 11:20.42: Waiting for worker…
2026-06-05 17:06.29: Got resource from pool OCluster
Building on ltsc2025-3
All commits already cached
HEAD is now at df8969d Dunify and be compatible with MirageOS 4 (for 1.14)


(from ocaml/opam:windows-server-mingw-ltsc2025-ocaml-5.4@sha256:6b6bcfd98b4600d5c8de1feffe95b566f1c337d961157c2fea3ccf3e3c5939bd)
2026-06-05 17:06.40 ---> using "47f7838a4aa9bba8b4a71358c252d241055ea2dd7e9e55067a8fc43fd8ca6486" from cache


C:/: (comment windows-server-mingw-ltsc2025-5.4_opam-2.5)


C:/: (user (uid 1000) (gid 1000))


C:/: (env CLICOLOR_FORCE 1)


C:/: (env OPAMCOLOR always)


C:/: (run (shell "ln -f /usr/local/bin/opam-2.5 /usr/local/bin/opam"))
2026-06-05 17:06.40 ---> using "13c53a6739a624f85cfa07c5897ebb2fe832e07df2a198c2ee35e9bcf7662cb5" from cache


C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "cd ~/opam-repository && (git cat-file -e a28353a4e21fc21cac49f64f1d99064fc11ce3f9 || git fetch origin master) && git reset -q --hard a28353a4e21fc21cac49f64f1d99064fc11ce3f9 && git log --no-decorate -n1 --oneline"))
From https://github.com/ocaml/opam-repository
* branch                  master     -> FETCH_HEAD
1138ca347f..5e37987930  master     -> origin/master
a28353a4e2 Merge pull request #29987 from ocaml/revert-29976-simpler-pkgconf
2026-06-05 17:06.40 ---> using "5a60dcf5c5c92d94b3f0724c10da0e6cff0c6a227d8bb1b6f261e8924fde9c5b" from cache


C:/: (run (shell "opam init --reinit -ni"))
No configuration file found, using built-in defaults.


<><> Unix support infrastructure ><><><><><><><><><><><><><><><><><><><><><><><>


opam and the OCaml ecosystem in general require various Unix tools in order to operate correctly. At present, this requires the installation of Cygwin to provide these tools.


How should opam obtain Unix tools?
> 1. Use tools found in PATH (Cygwin installation at C:\cygwin64)
2. Automatically create an internal Cygwin installation that will be managed by opam (recommended)
3. Use Cygwin installation found in C:\cygwin64
4. Use another existing Cygwin/MSYS2 installation
5. Abort initialisation


[1/2/3/4/5] 1
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.


<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-06-05 17:06.40 ---> using "6fba3dfbfd9a93e0ddecacd31e3d05e1579aaf1dfec721670594902cab2c3f43" from cache


C:/: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
CYGWIN_NT-10.0-26100 3.6.9-1.x86_64
The OCaml toplevel, version 5.4.1
2.5.1
2026-06-05 17:06.40 ---> using "4962e03493156df0fd197f33f43c63cddcfcbfda8e44c55286f0bd90ca4b18e8" from cache


C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam update -u"))


<><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><>
[default] no changes from git+file://C:/cygwin64/home/opam/opam-repository


Everything as up-to-date as possible
However, you may "opam upgrade" these packages explicitly at these versions (e.g. "opam upgrade ocaml.5.5.0"), which will ask permission to downgrade or uninstall the conflicting packages.
Nothing to do.
# To update the current shell environment, run: eval $(opam env)
2026-06-05 17:06.40 ---> using "56c1dc76b765e16d7890342d412a62e089ced73dc5f11c5d6317b3342c3edb9e" from cache


C:/: (copy (src zarith.opam) (dst /cygwin64/home/opam/src/./))
2026-06-05 17:07.54 ---> saved as "a4f36866a1f592447b1e8e77d4f4678af114d27a096e513a019b0bee3b4b7541"


C:/: (run (network host)
(shell "opam pin add -yn zarith.dev '/cygwin64/home/opam/src/./'"))
[zarith.dev] synchronised (file://C:/cygwin64/home/opam/src)
zarith is now pinned to file://C:/cygwin64/home/opam/src (version dev)
2026-06-05 17:08.53 ---> saved as "10c4527d87417212eb384aa15df1b1d2459a538f0a0f6565c2c0682281e00d8f"


C:/: (run (shell "echo '(lang dune 3.0)' > '/home/opam/src/./dune-project'"))
2026-06-05 17:09.40 ---> saved as "b55e7ce25379797a00dde0a1f366d241fc231703ba01020bf772ae2d7b32b731"


C:/: (env DEPS "arch-x86_64.1 base-bigarray.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base conf-m4.1 conf-mingw-w64-gcc-x86_64.1 dune.3.23.1 flexdll.0.44 gmp.6.3.0 host-arch-x86_64.1 host-system-mingw.1 mingw-w64-shims.0.2.0 ocaml.5.4.1 ocaml-base-compiler.5.4.1 ocaml-compiler.5.4.1 ocaml-config.3 ocaml-env-mingw64.1 ocaml-options-vanilla.1 system-mingw.1")


C:/: (env CI true)


C:/: (env OCAMLCI true)


C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam update --depexts && opam install --cli=2.5 --depext-only -y zarith.dev $DEPS"))


<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>
[zarith.dev] synchronised (file://C:/cygwin64/home/opam/src)


[NOTE] Package system-mingw is already installed (current version is 1).
[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-env-mingw64 is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.4.1).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.1).
[NOTE] Package ocaml is already installed (current version is 5.4.1).
[NOTE] Package mingw-w64-shims is already installed (current version is 0.2.0).
[NOTE] Package host-system-mingw is already installed (current version is 1).
[NOTE] Package host-arch-x86_64 is already installed (current version is 1).
[NOTE] Package flexdll is already installed (current version is 0.44).
[NOTE] Package conf-mingw-w64-gcc-x86_64 is already installed (current version is 1).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).
[NOTE] Package arch-x86_64 is already installed (current version is 1).
# To update the current shell environment, run: eval $(opam env)
2026-06-05 17:11.08 ---> saved as "314715744e06c0963ade64f1f81a2a0d23a725635cd3307b3652aba2751422fc"


C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam install $DEPS"))
[NOTE] Package system-mingw is already installed (current version is 1).
[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-env-mingw64 is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.4.1).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.1).
[NOTE] Package ocaml is already installed (current version is 5.4.1).
[NOTE] Package mingw-w64-shims is already installed (current version is 0.2.0).
[NOTE] Package host-system-mingw is already installed (current version is 1).
[NOTE] Package host-arch-x86_64 is already installed (current version is 1).
[NOTE] Package flexdll is already installed (current version is 0.44).
[NOTE] Package conf-mingw-w64-gcc-x86_64 is already installed (current version is 1).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).
[NOTE] Package arch-x86_64 is already installed (current version is 1).
The following actions will be performed:
=== install 3 packages
- install conf-m4 1
- install dune    3.23.1
- install gmp     6.3.0


<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved gmp.6.3.0  (cached)
-> installed conf-m4.1
-> retrieved dune.3.23.1  (cached)
-> installed dune.3.23.1
[ERROR] The compilation of gmp.6.3.0 failed at "dune build -p gmp -j 15".


#=== ERROR while compiling gmp.6.3.0 ==========================================#
# context     2.5.1 | win32/x86_64 | ocaml-base-compiler.5.4.1 system-mingw.1 | git+file://C:/cygwin64/home/opam/opam-repository
# path        C:\opam\.opam\5.4\.opam-switch\build\gmp.6.3.0
# command     C:\opam\.opam\5.4\bin\dune.exe build -p gmp -j 15
# exit-code   1
# env-file    C:\opam\.opam\log\gmp-22848-39a871.env
# output-file C:\opam\.opam\log\gmp-22848-39a871.out
### output ###
# File "src/dune", lines 3-7, characters 0-89:
# 3 | (library
# 4 |  (name gmp)
# 5 |  (public_name gmp)
# 6 |  (install_c_headers gmp)
# 7 |  (foreign_archives gmp))
# Error: No rule found for src/dllgmp.dll
# File "src/dune", lines 14-23, characters 0-357:
# 14 | (rule
# 15 |  (targets gmp.h libgmp.a dllgmp.so)
# 16 |  (deps gmp-6.3.0.tar.xz build.sh gcc.15.patch)
# 17 |  (action
# 18 |   (with-stdout-to
# 19 |    build.log
# 20 |    (run sh ./build.sh "%{ocaml-config:c_compiler}" "%{ocaml-config:host}"
# 21 |      "%{ocaml-config:target}" "%{ocaml-config:ocamlc_cflags}"
# 22 |      %{ocaml-config:supports_shared_libraries}
# 23 |      "%{ocaml-config:native_c_libraries}"))))
# (cd _build/default/src && C:\cygwin64\bin\sh.exe ./build.sh x86_64-w64-mingw32-gcc x86_64-w64-mingw32 x86_64-w64-mingw32 "-O2 -fno-strict-aliasing -fwrapv -mms-bitfields" true "-lws2_32 -lole32 -luuid -lversion -lshlwapi -lsynchronization -l:libpthread.a -lgcc_eh") > _build/default/src/build.log
# libtool: warning: undefined symbols not allowed in x86_64-w64-mingw32 shared libraries; building static only
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/clear.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/clears.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/reldiff.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/random2.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# ./libtool: line 3389: warning: command substitution: ignored null byte in input
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/cmp_z.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/cmp.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/cmp_d.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/cmp_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/cmp_si.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# ./libtool: line 3389: warning: command substitution: ignored null byte in input
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpf/ceilfloor.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# ./libtool: line 3389: warning: command substitution: ignored null byte in input
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_q.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_q_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_qr.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_qr_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_r.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_r_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cdiv_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cfdiv_q_2exp.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cfdiv_r_2exp.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/clrbit.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cmpabs.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cmpabs_d.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cmpabs_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/com.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/combit.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cong.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cong_2exp.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/cong_ui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/random.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/realloc.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/realloc2.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/remove.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/roinit_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/root.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/rootrem.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpz/rrandomb.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# ./libtool: line 3389: warning: command substitution: ignored null byte in input
# ./libtool: line 3389: warning: command substitution: ignored null byte in input
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpq/canonicalize.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/cnd_add_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/cnd_sub_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/cnd_swap.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rshift.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/compute_powtab.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/redc_1.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/redc_2.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/redc_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/copyi.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/copyd.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/comb_tables.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rsblsh1_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rsh1add_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rsh1sub_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rsblsh2_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'mpn/rsblsh_n.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/rand.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randclr.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randdef.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randiset.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randlc2s.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randlc2x.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randmt.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randmts.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/rands.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randsd.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randsdui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randbui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# libtool:   error: Could not determine host file name corresponding to
# libtool:   error:   'rand/randmui.o'
# libtool:   error: Continuing, but uninstalled executables may not work.
# x86_64-w64-mingw32-ar: @Microsoft: No such file or directory
# ./libtool: eval: line 1751: syntax error near unexpected token `Microsoft'
# ./libtool: eval: line 1751: `(c) Microsoft Corporation. All rights reserved.
'
# make[2]: *** [Makefile:883: libgmp.la] Error 2
# make[1]: *** [Makefile:998: all-recursive] Error 1
# make: *** [Makefile:788: all] Error 2


<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build gmp 6.3.0
+- 
+- The following changes have been performed
| - install conf-m4 1
| - install dune    3.23.1
+- 
# 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\\5.4\\.opam-switch\\backup\\state-20260605171150.export"
"C:\cygwin64\bin\bash.exe" "-lc" "opam install $DEPS" failed with exit status 31
2026-06-05 17:32.36: Job failed: Failed: Build failed