Thomie Thanks for fixing the testsuite on Windows. I still get some new failures Test framework failures: T10294a (normal) T10420 (normal) T11244 (normal) plugins07 (normal) The log file for one of them is below. Oddly, if I subsequently run a single test make TEST=plugins07 it works fine. Maybe something to do with something not being built? Simon =====> plugins07(normal) 2705 of 5154 [0, 8, 0] cd "c:\users\simonpj\appdata\local\temp\ghctest-pk_7er\test spaces\1\2\3\.\plugins\plugins07" && $MAKE -s --no-print-directory -C rule-defining-plugin package.plugins07 TOP=C:/code/HEAD/testsuite setup.exe: does not exist Makefile:12: recipe for target 'package.plugins07' failed make[3]: *** [package.plugins07] Error 1 *** framework failure for plugins07(normal) pre-command failed: 512 cd "c:\users\simonpj\appdata\local\temp\ghctest-pk_7er\test spaces\1\2\3\.\plugins\plugins07" && $MAKE -s --no-print-directory plugins07 plugins07.run.stdout 2> plugins07.run.stderr Wrong exit code (expected 0 , actual 2 ) Stdout: Makefile:16: recipe for target 'plugins07' failed Stderr: <command line>: cannot satisfy -plugin-package rule-defining-plugin (use -v for more information) make[3]: *** [plugins07] Error 1 *** unexpected failure for plugins07(normal)