Let's try this

Author: shirok

download-and-install-gauche.sh

@@ -50,8 +50,10 @@ if [ "$binary" = 'true' ]; then
             exit 1 ;;
     esac
     echo "Instaling $binary_url/$binary_tarball"
-    curl -L -f -o /tmp/$binary_tarball $binary_url/$binary_tarball
-    sudo tar x -C / -z -v -f /tmp/$binary_tarball
+    curl -L -f -o $binary_tarball $binary_url/$binary_tarball
+    mkdir package
+    (cd package; tar xzvf ../$binary_tarball)
+    sudo cp -r package /
 else
     curl -f -o get-gauche.sh $get_gauche_url
     chmod +x get-gauche.sh