fsmgr: fix .deb installs

1 files changed, 1 insertions, 1 deletions

diff --git a/fsmgr.hs b/fsmgr.hs
index 837293e..57d04f1 100644
--- a/fsmgr.hs
+++ b/fsmgr.hs
@@ -157,7 +157,7 @@ buildRoot config@DiskImageConfig{..} finalOut = do
     when (not $ null debs) $ do
       need debs
       cmd_ (AddEnv "DEBIAN_FRONTEND" "noninteractive")
-           ["dpkg"] [if unpackOnly then "--unpack" else "--install"] debs
+           ["dpkg"] [if unpackOnly then "--unpack" else "--install"] ["--root", mountpoint] debs
     {- 2.5. install apt package cache -}
     when installAptLists $ do
       cmd_ "rsync -Ra" (("/./" ++) <$> aptListFiles aptListCfg) (mountpoint ++ "/")