diff --git a/components/HaskellTools.dhall b/components/HaskellTools.dhall
index 31f69839f0e9c75d6963234ce741bfa916529cf5..079d0920cc188334109a17c82fef487b8d8ffb81 100644
--- a/components/HaskellTools.dhall
+++ b/components/HaskellTools.dhall
@@ -15,14 +15,15 @@ let
          -- We must override store-dir lest data files end up in
          -- /root/.cabal, which isn't accessible to the build user
       , ''
-        $CABAL v2-install \
+        $CABAL \
+          --store-dir=${outDir}/store \
+          v2-install \
           hscolour happy alex \
           --constraint='happy ^>= 1.20' \
           --with-compiler=$GHC \
           --enable-static \
           --install-method=copy \
-          --installdir=${binDir} \
-          --store-dir=${outDir}/store
+          --installdir=${binDir}
         ''
       ]
     # CF.env (toMap