diff --git a/doc/bugs/windows_FTBFS__58___Could_not_find_module_System.Posix.mdwn b/doc/bugs/windows_FTBFS__58___Could_not_find_module_System.Posix.mdwn
new file mode 100644
index 0000000000..c4cf83a944
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+++ b/doc/bugs/windows_FTBFS__58___Could_not_find_module_System.Posix.mdwn
@@ -0,0 +1,50 @@
+### Please describe the problem.
+
+Started to happen recently:
+
+```
+❯ git grep 'ould not find module .System.Posix.IO'
+cron-20241016/build-windows.yaml-1613-1929a4fc-failed/0_build-package.txt:2024-10-16T03:47:07.6376436Z ##[error]    Could not find module `System.Posix.IO'.
+cron-20241016/build-windows.yaml-1613-1929a4fc-failed/build-package/18_Build git-annex.txt:2024-10-16T03:47:07.6376375Z ##[error]    Could not find module `System.Posix.IO'.
+cron-20241017/build-windows.yaml-1614-1929a4fc-failed/0_build-package.txt:2024-10-17T03:45:41.3251590Z ##[error]    Could not find module `System.Posix.IO'.
+cron-20241017/build-windows.yaml-1614-1929a4fc-failed/build-package/18_Build git-annex.txt:2024-10-17T03:45:41.3251517Z ##[error]    Could not find module `System.Posix.IO'.
+cron-20241018/build-windows.yaml-1615-844a1bc5-failed/0_build-package.txt:2024-10-18T03:46:27.8014646Z ##[error]    Could not find module `System.Posix.IO'.
+cron-20241018/build-windows.yaml-1615-844a1bc5-failed/build-package/18_Build git-annex.txt:2024-10-18T03:46:27.8014601Z ##[error]    Could not find module `System.Posix.IO'.
+```
+
+```
+2024-10-16T03:47:07.6264270Z [ 91 of 739] Compiling Utility.OpenFile
+2024-10-16T03:47:07.6264781Z 
+2024-10-16T03:47:07.6314519Z D:\a\git-annex\git-annex\Utility\OpenFile.hs:11:1: error: [GHC-87110]
+2024-10-16T03:47:07.6376436Z ##[error]    Could not find module `System.Posix.IO'.
+2024-10-16T03:47:07.6378352Z [ 92 of 739] Compiling Utility.FileSize
+2024-10-16T03:47:07.6379064Z     Use -v to see a list of the files searched for.
+2024-10-16T03:47:07.6379741Z [ 93 of 739] Compiling Utility.FileMode
+2024-10-16T03:47:07.6380363Z    |
+2024-10-16T03:47:07.6380751Z [ 94 of 739] Compiling Git.FileMode
+2024-10-16T03:47:07.6381306Z 11 | import System.Posix.IO
+2024-10-16T03:47:07.6381845Z [ 95 of 739] Compiling Types.Transitions
+2024-10-16T03:47:07.6382417Z    | ^^^^^^^^^^^^^^^^^^^^^^
+```
+
+full logs are on smaug or for a while on [github actions](https://github.com/datalad/git-annex/actions/workflows/build-windows.yaml)
+
+### What steps will reproduce the problem?
+
+
+### What version of git-annex are you using? On what operating system?
+
+
+### Please provide any additional information below.
+
+[[!format sh """
+# If you can, paste a complete transcript of the problem occurring here.
+# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
+
+
+# End of transcript or log.
+"""]]
+
+### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
+
+