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Ensure unique list of build tools

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Michael Snoyman 2013-01-29 16:25:20 +02:00
parent a2f2434fc9
commit e479c6473c
1 changed files with 2 additions and 0 deletions
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Stackage/Select.hs
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@ -49,6 +49,8 @@ iiBuildTools InstallInfo { iiPackageDB = PackageDB m, iiPackages = packages } =
$ topSort
$ map addDependencies
$ filter (flip Set.notMember coreTools . fst)
$ Set.toList
$ Set.fromList
$ mapMaybe (flip Map.lookup buildToolMap)
$ Set.toList
$ Set.unions