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-rw-r--r--src/Propellor/Property/Apt.hs6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/Propellor/Property/Apt.hs b/src/Propellor/Property/Apt.hs
index 471d6195..68e877ed 100644
--- a/src/Propellor/Property/Apt.hs
+++ b/src/Propellor/Property/Apt.hs
@@ -193,13 +193,15 @@ isInstalled p = (== [True]) <$> isInstalled' [p]
-- even vary. If apt does not know about a package at all, it will not
-- be included in the result list.
isInstalled' :: [Package] -> IO [Bool]
-isInstalled' ps = catMaybes . map parse . lines
- <$> readProcess "apt-cache" ("policy":ps)
+isInstalled' ps = catMaybes . map parse . lines <$> policy
where
parse l
| "Installed: (none)" `isInfixOf` l = Just False
| "Installed: " `isInfixOf` l = Just True
| otherwise = Nothing
+ policy = do
+ environ <- addEntry "LANG" "C" <$> getEnvironment
+ readProcessEnv "apt-cache" ("policy":ps) (Just environ)
autoRemove :: Property
autoRemove = runApt ["-y", "autoremove"]