### Please describe the problem.

Continuation to [bugs/windows_FTBFS__44___advise_needed](https://git-annex.branchable.com/bugs/windows_FTBFS__44___advise_needed/) which was marked fixed but now FTBFS with 

```
[38 of 40] Compiling Utility.CopyFile ( Utility\CopyFile.hs, Utility\CopyFile.o )
Utility\CopyFile.hs:9:1: warning: [GHC-94817] [-Wtabs]
Warning:     Tab character found here, and in 84 further locations.
    Suggested fix: Please use spaces instead.
  |
9 |         copyFileExternal,

  | ^^^^^^^^

[39 of 40] Compiling Main             ( Build\NullSoftInstaller.hs, Build\NullSoftInstaller.o )
Build\NullSoftInstaller.hs:64:34: error: [GHC-83865]
Error:     • Couldn't match type ‘bytestring-0.12.2.0:Data.ByteString.Internal.Type.ByteString’
                     with ‘[Char]’
      Expected: FilePath
        Actual: System.FilePath.Windows.ByteString.RawFilePath
    • In the second argument of ‘makeInstaller’, namely ‘gitannexcmd’
      In the second argument of ‘($)’, namely
        ‘makeInstaller
           gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs')
           magicShare' [webappscript, autostartscript]’
      In a stmt of a 'do' block:
        F.writeFileString (toOsPath nsifile)
          $ makeInstaller
              gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs')
              magicShare' [webappscript, autostartscript]
   |
64 |                         gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs') magicShare'

   |                                  ^^^^^^^^^^^

Build\NullSoftInstaller.hs:64:54: error: [GHC-83865]
Error:     • Couldn't match type ‘bytestring-0.12.2.0:Data.ByteString.Internal.Type.ByteString’
                     with ‘[Char]’
      Expected: FilePath
        Actual: System.FilePath.Windows.ByteString.RawFilePath
    • In the fourth argument of ‘makeInstaller’, namely ‘htmlhelp’
      In the second argument of ‘($)’, namely
        ‘makeInstaller
           gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs')
           magicShare' [webappscript, autostartscript]’
      In a stmt of a 'do' block:
        F.writeFileString (toOsPath nsifile)
          $ makeInstaller
              gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs')
              magicShare' [webappscript, autostartscript]
   |
64 |                         gitannex gitannexcmd license htmlhelp (winPrograms ++ magicDLLs') magicShare'

   |                                                      ^^^^^^^^

Error: Process completed with exit code 1.
```

e.g. [here](https://github.com/datalad/git-annex/actions/runs/17903960530/job/50901925018)

> [[fixed|done]] --[[Joey]]
