diff --git a/standalone/android/install-haskell-packages b/standalone/android/install-haskell-packages
index b4ff871a90..fcc31c71c5 100755
--- a/standalone/android/install-haskell-packages
+++ b/standalone/android/install-haskell-packages
@@ -32,9 +32,9 @@ patched () {
 		ver="$(grep " $pkg " ../cabal.config | cut -d= -f 3 | sed 's/,$//')"
 	fi
 	if [ -z "$ver" ]; then
-		cabal unpack $pkg
+		cabal unpack --pristine $pkg
 	else
-		cabal unpack $pkg-$ver
+		cabal unpack --pristine $pkg-$ver
 	fi
 	cd $pkg*
 	git init
diff --git a/standalone/linux/install-haskell-packages b/standalone/linux/install-haskell-packages
index 0ddc70b6a5..6fa4aeb170 100755
--- a/standalone/linux/install-haskell-packages
+++ b/standalone/linux/install-haskell-packages
@@ -28,9 +28,9 @@ patched () {
                 ver="$(grep " $pkg " ../cabal.config | cut -d= -f 3 | sed 's/,$//')"
         fi
         if [ -z "$ver" ]; then
-                cabal unpack $pkg
+                cabal unpack --pristine $pkg
         else
-                cabal unpack $pkg-$ver
+                cabal unpack --pristine $pkg-$ver
         fi
 	cd $pkg*
 	git init