#7779: building GHC overwrites the installed package database if GHC_PACKAGE_PATH is set ---------------------------------+------------------------------------------ Reporter: heatsink | Owner: igloo Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Build System | Version: 7.4.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by heatsink): I expect building software to pose no risk of breaking any installed software. It is understandable that installing software may break other software, but building should not. I've been using `GHC_PACKAGE_PATH` to install two versions of GHC that both call themselves `ghc-7.4.2`. By default, they both look in the same user package database, which breaks at least one of the two versions because packages are not compatible with both GHCs. Setting `GHC_PACKAGE_PATH` fixes that problem. Cabal works if given options `--global --package-db=$FOO`. If this way of managing paths is deprecated, then I'd like to have an alternative. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7779#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler