diff --git a/build/windows/installer/3_dist-gimp-inno.ps1 b/build/windows/installer/3_dist-gimp-inno.ps1
index de824ab536..b932f9baae 100644
--- a/build/windows/installer/3_dist-gimp-inno.ps1
+++ b/build/windows/installer/3_dist-gimp-inno.ps1
@@ -33,8 +33,10 @@ if (-not $GITLAB_CI)
 #if (-not (Get-Command "python" -ErrorAction SilentlyContinue) -or "$(Get-Command "python" -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Source)" -like '*WindowsApps*')
 #  {
     Invoke-Expression ((Get-Content build\windows\1_build-deps-msys2.ps1 | Select-String 'MSYS_ROOT\)' -Context 0,12) -replace '> ','')
-    $env:PATH = "$MSYS_ROOT/usr/bin;" + $env:PATH
-    Invoke-Expression ((Get-Content .gitlab-ci.yml | Select-String 'win_environ\[' -Context 0,7) -replace '> ','' -replace '- ','')
+    #Need to install python modules (see lang\fix_msg.py)
+    $env:MSYS_ROOT = "$MSYS_ROOT"
+    #Needed to run python
+    $env:PATH = "$MSYS_ROOT/$MSYSTEM_PREFIX/bin;" + $env:PATH
 #  }
 
 
diff --git a/build/windows/installer/lang/fix_msg.py b/build/windows/installer/lang/fix_msg.py
index 42cf502d98..e3968938bd 100644
--- a/build/windows/installer/lang/fix_msg.py
+++ b/build/windows/installer/lang/fix_msg.py
@@ -13,7 +13,7 @@ except ImportError:
     subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'charset_normalizer'])
   else:
     MINGW_PACKAGE_PREFIX = "mingw-w64-clang-aarch64" if platform.machine() == "ARM64" else "mingw-w64-clang-x86_64"
-    subprocess.check_call(['powershell', 'pacman', '--noconfirm', '-S', '--needed', f"{MINGW_PACKAGE_PREFIX}-python-charset-normalizer"])
+    subprocess.check_call(['powershell', os.getenv("MSYS_ROOT") + '/usr/bin/pacman', '--noconfirm', '-S', '--needed', f"{MINGW_PACKAGE_PREFIX}-python-charset-normalizer"])
 finally:
   from charset_normalizer import detect