c3-lang/libffi

diff --git a/.appveyor.yml b/.appveyor.yml
index f095f7b..1f82089 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -62,7 +62,7 @@ install:
           $env:DEBUG_ARG="--disable-debug"
       }
   - 'appveyor DownloadFile https://cygwin.com/setup-x86.exe -FileName setup.exe'
-  - 'setup.exe -qnNdO -R "%CYG_ROOT%" -s "%CYG_MIRROR%" -l "%CYG_CACHE%" -P dejagnu,perl >NUL'
+  - 'setup.exe -qnNdO -R "%CYG_ROOT%" -s "%CYG_MIRROR%" -l "%CYG_CACHE%" -P dejagnu,automake'
   - '%CYG_ROOT%/bin/bash -lc "cygcheck -dc cygwin"'
   - echo call VsDevCmd to set VS150COMNTOOLS
   - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\Tools\VsDevCmd.bat"