Index: appveyor.yml
===================================================================
diff -u -rfffcee32ce6d0ff4f781c8980abb73680ce619a8 -r05d909f4845594ff7f53eac73f3d53c3759683ab
--- appveyor.yml	(.../appveyor.yml)	(revision fffcee32ce6d0ff4f781c8980abb73680ce619a8)
+++ appveyor.yml	(.../appveyor.yml)	(revision 05d909f4845594ff7f53eac73f3d53c3759683ab)
@@ -14,10 +14,12 @@
   - TCLTAG: core-8-6-branch
 
 install:
+  - set PATH=C:\msys64\usr\bin;%PATH%
   - if not exist "%MINGW_ARCHIVE%" appveyor DownloadFile "%MINGW_URL%" -FileName "%MINGW_ARCHIVE%"
   - 7z x -y "%MINGW_ARCHIVE%" > nul
   - appveyor DownloadFile "%TCLKIT_URL%" -FileName "%TCLKIT%"
-  - set Path=%CD%\%MINGW_DIR%\bin;%Path%
+  - set CHERE_INVOKING=1
+  - bash -lc "echo \"export PATH=`pwd`/${MINGW_DIR}:$PATH\" >> ~/.bash_profile"
 
 build_script:
   - tclkit.exe apps/build.tcl %CD% %APPVEYOR_BUILD_FOLDER% %TCLTAG%