Building on ltsc2025-1
(from ocaml/opam:windows-server-mingw-ltsc2025-opam)
2026-03-28 20:36.42 ---> 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"))
2026-03-28 20:36.42 ---> 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"))
2026-03-28 20:36.42 ---> 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.
2026-03-28 20:36.42 ---> 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 $(opam env --switch=mingw-5.4)
2026-03-28 20:36.42 ---> using "fef9a386bcc007a13a835243258296c6fba53ee56a7f3e7d366a20891bb1dbf6" from cache
C:/: (run (network host)
(shell "opam update --depexts"))
2026-03-28 20:36.42 ---> using "c1b87f3ba265cc602c17b1d72cdbd101c4febb3b928180288e5808ce3e9dbec0" from cache
C:/: (run (cache (opam-archives (target "c:\\opam\\.opam\\download-cache")))
(network host)
(shell "opam remove -y conf-cuda.1\
\nopam install -vy conf-cuda.1\
\nres=$?\
\nif [ $res = 31 ]; then\
\n if opam show -f x-ci-accept-failures: conf-cuda.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 $res"))
Nothing to do.
[NOTE] conf-cuda.1 is not installed.
The following actions will be performed:
=== install 2 packages
- install conf-cuda 1
- install conf-cuda-config 1 [required by conf-cuda]
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Processing 3/6: [conf-cuda-config: sh]
+ C:\cygwin64\bin\sh.exe "-exc" "\n if [ -d \"$CUDA_PATH\" ]; then\n CUDA_PREINSTALLED=\"true\"\n elif [ -d \"/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.8\" ]; then\n CUDA_PATH=\"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v12.8\"\n CUDA_PREINSTALLED=\"true\"\n elif [ -d \"/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.9\" ]; then\n CUDA_PATH=\"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v12.9\"\n CUDA_PREINSTALLED=\"true\"\n elif [ -d \"/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v13.0\" ]; then\n CUDA_PATH=\"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.0\"\n CUDA_PREINSTALLED=\"true\"\n elif [ -d \"/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v13.1\" ]; then\n CUDA_PATH=\"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v13.1\"\n CUDA_PREINSTALLED=\"true\"\n elif [ -d \"/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA\" ]; then\n CUDA_PREINSTALLED=\"true\"\n else\n CUDA_PREINSTALLED=\"false\"\n fi\n echo 'opam-version: \"2.0\" variables { cuda_preinstalled: \"'$CUDA_PREINSTALLED'\" cuda_path: \"'$CUDA_PATH'\" }' > conf-cuda-config.config\n " (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda-config.1)
- + '[' -d '' ']'
- + '[' -d '/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.8' ']'
- + '[' -d '/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.9' ']'
- + '[' -d '/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v13.0' ']'
- + '[' -d '/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v13.1' ']'
- + '[' -d '/cygdrive/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA' ']'
- + CUDA_PREINSTALLED=false
- + echo 'opam-version: "2.0" variables { cuda_preinstalled: "false" cuda_path: "" }'
Processing 3/6: [conf-cuda-config: sh cat conf-cuda-config.config]
+ C:\cygwin64\bin\sh.exe "-exc" "cat conf-cuda-config.config" (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda-config.1)
- + cat conf-cuda-config.config
- opam-version: "2.0" variables { cuda_preinstalled: "false" cuda_path: "" }
Processing 3/6: [conf-cuda-config: powershell (Get-Content -Raw conf-cuda-config.config) -replace '\\', '\\' | Set-Content conf-cuda-config.config]
+ C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe "-Command" "(Get-Content -Raw conf-cuda-config.config) -replace '\\\\', '\\\\' | Set-Content conf-cuda-config.config" (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda-config.1)
Processing 3/6: [conf-cuda-config: sh cat conf-cuda-config.config]
+ C:\cygwin64\bin\sh.exe "-exc" "cat conf-cuda-config.config" (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda-config.1)
- + cat conf-cuda-config.config
- opam-version: "2.0" variables { cuda_preinstalled: "false" cuda_path: "" }
-
-> compiled conf-cuda-config.1
-> installed conf-cuda-config.1
Processing 5/6: [conf-cuda: sh cat <<EOF > test.c
#include "cuda.h"
#include "nvrtc.h"
]
+ C:\cygwin64\bin\sh.exe "-exc" "cat <<EOF > test.c\n #include \"cuda.h\"\n #include \"nvrtc.h\"\n " (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda.1)
- /usr/bin/sh: line 4: warning: here-document at line 1 delimited by end-of-file (wanted `EOF')
- + cat
Processing 5/6: [conf-cuda: sh]
+ C:\cygwin64\bin\sh.exe "-exc" "$(ocamlc -config-var c_compiler) -c $CFLAGS -I'/include' test.c" (CWD=C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda.1)
[ERROR] The compilation of conf-cuda.1 failed at "sh -exc $(ocamlc -config-var c_compiler) -c $CFLAGS -I'/include' test.c".
#=== ERROR while compiling conf-cuda.1 ========================================#
# context 2.5.0 | win32/x86_64 | ocaml-base-compiler.5.4.0 | git+file://C:/cygwin64/home/opam/opam-repository
# path C:\opam\.opam\mingw-5.4\.opam-switch\build\conf-cuda.1
# command C:\cygwin64\bin\sh.exe -exc $(ocamlc -config-var c_compiler) -c $CFLAGS -I'/include' test.c
# exit-code 1
# env-file C:\opam\.opam\log\conf-cuda-26204-d47ec5.env
# output-file C:\opam\.opam\log\conf-cuda-26204-d47ec5.out
### output ###
# ++ ocamlc -config-var c_compiler
# + x86_64-w64-mingw32-gcc -c -I/include test.c
# test.c:1:14: fatal error: cuda.h: No such file or directory
# 1 | #include "cuda.h"
# | ^~~~~~~~
# compilation terminated.
- ++ ocamlc -config-var c_compiler
- + x86_64-w64-mingw32-gcc -c -I/include test.c
- test.c:1:14: fatal error: cuda.h: No such file or directory
- 1 | #include "cuda.h"
- | ^~~~~~~~
- compilation terminated.
<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build conf-cuda 1
+-
+- The following changes have been performed
| - install conf-cuda-config 1
+-
<><> conf-cuda-config.1 installed successfully ><><><><><><><><><><><><><><><><>
=> NOTE: assuming CUDA will be installed under
<><> conf-cuda.1 troubleshooting ><><><><><><><><><><><><><><><><><><><><><><><>
=> Manually install CUDA or verify that CUDA_PATH is set properly. See: https://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/index.html
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-20260328203710.export"
'C:\cygwin64\usr\local\bin\opam.exe install -vy conf-cuda.1' failed.
# To update the current shell environment, run: eval $(opam env)
"C:\cygwin64\bin\bash.exe" "-lc" "opam remove -y conf-cuda.1
opam install -vy conf-cuda.1
res=$?
if [ $res = 31 ]; then
if opam show -f x-ci-accept-failures: conf-cuda.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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