diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 27d8501..c584211 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,6 +16,7 @@ jobs:
         run: |
           rev=`git rev-parse HEAD`
           pwd
+          set -x
           ./install.sh -adl
           test `git rev-parse HEAD` = "$rev"
 
@@ -58,6 +59,7 @@ jobs:
         run: |
           rev=`git rev-parse HEAD`
           pwd
+          set -x
           ./install.sh -adl
           test `git rev-parse HEAD` = "$rev"
 
@@ -103,6 +105,7 @@ jobs:
       - name: install dfs
         run: |
           rev=`git rev-parse HEAD`
+          set -x
           ./install.sh -dal
           test `git rev-parse HEAD` = "$rev"
 
diff --git a/install.sh b/install.sh
index 4bcce56..f0bca65 100755
--- a/install.sh
+++ b/install.sh
@@ -37,10 +37,10 @@ install_dependencies()
             $SUDO DFS_LITE=$DFS_LITE "$DOTFILES/tools/alpine.sh" apk-add
             ;;
         "macos" )
-            $SUDO DFS_LITE=$DFS_LITE "$DOTFILES/tools/macos.sh" brew-install
+            DFS_LITE=$DFS_LITE "$DOTFILES/tools/macos.sh" brew-install
             ;;
         "msys" )
-            $SUDO DFS_LITE=$DFS_LITE "$DOTFILES/tools/msys2.sh" pacman-S
+            DFS_LITE=$DFS_LITE "$DOTFILES/tools/msys2.sh" pacman-S
             ;;
         * ) fmt_error "dfs auto-install is not implemented on OS: $(get_os_name)"
     esac