diff --git a/install.sh b/install.sh
index 4b83e32..1fd17bd 100755
--- a/install.sh
+++ b/install.sh
@@ -15,15 +15,19 @@ echo "Install directory: '$_install_dir'"
 echo ""
 
 for _file in ./src/* ; do
+  _destination="$_install_dir"$(basename "$_file")
   if [ $_uninstall -eq 0 ] ; then
-    echo "installing: $_file"
-    sudo cp "$_file" "$_install_dir"
+    if ! [ -e "$_destination" ] ; then
+      echo "installing: $_file"
+      sudo cp "$_file" "$_install_dir"
+    else
+      echo "file present - skipping: $_file"
+    fi
   elif [ $_uninstall -eq 1 ] ; then
-    _filename=$(basename "$_file")
-    # WARNING - need to ensure $_filename is not empty (/usrlocal/bin will be deleted)
-    if [ -n "$_filename" ]; then
-      echo "uninstalling: $_filename"
-      sudo rm "$_install_dir$_filename"
+    # WARNING - need to ensure $_filename is not empty (/usr/local/bin will be deleted)
+    if [ -n "$_destination" ] ; then
+      echo "uninstalling: $_destination"
+      sudo rm "$_install_dir$_destination"
     fi
   fi
 done