diff --git a/Propellor/Property/Apt.hs b/Propellor/Property/Apt.hs
index a01ab3c..2aeeab7 100644
--- a/Propellor/Property/Apt.hs
+++ b/Propellor/Property/Apt.hs
@@ -5,6 +5,7 @@ import Control.Applicative
 import Data.List
 import System.IO
 import Control.Monad
+import System.Process (env)
 
 import Propellor
 import qualified Propellor.Property.File as File
@@ -195,12 +196,13 @@ reConfigure package vals = reconfigure `requires` setselections
 	`describe` ("reconfigure " ++ package)
   where
 	setselections = Property "preseed" $ makeChange $
-		withHandle StdinHandle createProcessSuccess
-			(proc "debconf-set-selections" []) $ \h -> do
-				forM_ vals $ \(tmpl, tmpltype, value) ->
-					hPutStrLn h $ unwords [package, tmpl, tmpltype, value]
-				hClose h
+		withHandle StdinHandle createProcessSuccess p $ \h -> do
+			forM_ vals $ \(tmpl, tmpltype, value) ->
+				hPutStrLn h $ unwords [package, tmpl, tmpltype, value]
+			hClose h
 	reconfigure = cmdProperty "dpkg-reconfigure" ["-fnone", package]
+	p = (proc "debconf-set-selections" [])
+		{ env = Just noninteractiveEnv }
 
 -- | Ensures that a service is installed and running.
 --
diff --git a/Propellor/Property/Postfix.hs b/Propellor/Property/Postfix.hs
index 4967664..f4be27c 100644
--- a/Propellor/Property/Postfix.hs
+++ b/Propellor/Property/Postfix.hs
@@ -15,7 +15,7 @@ installed = Apt.serviceInstalledRunning "postfix"
 satellite :: Property
 satellite = setup `requires` installed
   where
-	setup = Property "postfix satellite system" $ do
+	setup = trivial $ Property "postfix satellite system" $ do
 		hn <- getHostName
 		ensureProperty $ Apt.reConfigure "postfix"
 			[ ("postfix/main_mailer_type", "select", "Satellite system")