Hello, 2 patches to contribute to cabal. The first is a simple oversite I noticed while implementing the second. Essentially, the call out to an external command by system has every supplied string wrapped in ', but doesn't escape this character. This is fixed in the first patch. Thu Aug 4 20:06:11 EDT 2011 matt@mattcox.ca * Protect internal ' in quoted system commands The previous implementation did not escape ' in the input which causes them to break the quotation. The second is support that I require for a project which needs to use hooks to invoke cmake and make to build a legacy C component. I followed the existing code conventions which make a few questionable choices. For one, the progInvokeEnv field is [(String, String)] rather than Maybe [(String, String)] like is used by e.g., runInteractiveProcess. The interpretation in the existing code is that this is a supplemental list of environment variables rather than a complete environment. There is no way to remove existing variable with this representation other than assigning them empty values. This is a different interpretation to that used by rawSystemExitWithEnv, which uses it as the entire environment. I had the runInvokation functions merge the supplied environment on top of the system environment rather than modify the behaviour of the rawSystemExitWithEnv function. The rawSystemExit functions were given variants accepting working directories rather than adding a Maybe FilePath argument and changing the type signature. I hope that this can go in for 1.12. In particular, I'd like to suggest a bump to 1.11.3 so that I can depend on the version to ensure the behaviour introduced in this patch is available. Fri Aug 5 12:19:48 EDT 2011 matt@mattcox.ca * Finish implementing Distribution.Simple.Program.Run The environment and working directory settings in the ProgramInvocation record were not totally handled by the run invocation functions in the module. The selection of a working directory was implemented for all functions, and input set in the invocation is handled by getProgramInvocation output. The environment in the record is taken to be a list of supplemental environment settings to add or override the system environment variables, rather than as a complete environment. This is the behaviour implemented by the functions in Distribution.Simple.Program.Script. New functions taking an environment and working directory were added to the Distribution.Simple.Utils module.