-- if [%COMPILER%]==[MinGW-w64] set PATH=C:\mingw64\bin;%PATH%
-- if [%COMPILER%]==[MinGW-w64] rename "C:\Program Files (x86)\Git\bin\sh.exe" "sh2.exe"
-- if [%COMPILER%]==[MinGW-w64] appveyor DownloadFile "https://raw.githubusercontent.com/symengine/dependencies/5cff7d1736877336cf9fb58267111beea4fa152f/x86_64-4.9.1-release-posix-seh-rt_v3-rev1.7z" -FileName mw64.7z || appveyor DownloadFile "https://raw.githubusercontent.com/symengine/dependencies/5cff7d1736877336cf9fb58267111beea4fa152f/x86_64-4.9.1-release-posix-seh-rt_v3-rev1.7z" -FileName mw64.7z
+# Perl: The installed version breaks with Perl::IPC 0.94. Get an older one.
+- call .appveyor-download.cmd "http://strawberryperl.com/download/5.18.4.1/strawberry-perl-5.18.4.1-64bit.msi" -FileName strawberry-perl.msi
+- msiexec /i "strawberry-perl.msi" /qn INSTALLDIR="C:\projects\perl"
+# Sane migwin, as installed by symengine
+- if [%COMPILER%]==[MinGW-w64] call .appveyor-download.cmd "https://raw.githubusercontent.com/symengine/dependencies/5cff7d1736877336cf9fb58267111beea4fa152f/x86_64-4.9.1-release-posix-seh-rt_v3-rev1.7z" -FileName mw64.7z