Hi all, While working on #1105 ("Rebuild source directories added to the sandbox"), I encountered a problem: there is no way to reinstall a bunch of packages + all their reverse dependencies. Right now when you run sandbox-build it does the following (see the cabal-sandbox branch in my repo [1]): cabal install /path/to/add-source-dep-1 ... /path/to/add-source-dep-N --force-reinstall && cabal build Unfortunately, this doesn't reinstall the reverse dependencies of add-source deps, which can obviously break them (hence the need for --force-reinstall). I tried several option combinations, but nothing gives me what I want. To solve this, I propose adding an option '--only-dependencies-of=TARGET' that would work like '--only-dependencies', but only remove TARGET from the install plan (see adjustOnlyDependencies in D.C.Install). This would make it possible to implement sandbox-build in the following fashion: cabal install /path/to/add-source-dep-1 ... /path/to/add-source-dep-N --only-dependencies-of=. && cabal build Comments? [1] https://github.com/23Skidoo/cabal/commits/cabal-sandbox -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments