diff --git a/scripts/os_debian b/scripts/os_debian
index 8c3a693..c415359 100755
--- a/scripts/os_debian
+++ b/scripts/os_debian
@@ -103,7 +103,7 @@ echo
 read -p "About to install the system packages per the backup. Do you want to continue? [Y/n] " -n 1 -sr promptPkgs
 if [[ "\$promptPkgs" =~ ^[Yy] ]]; then
     echo "Yes"
-    comm --nocheck-order -23 InstallOnly.list <(apt-mark showmanual|sort) grep -Ev 'linux-image|linux-headers' > "\${TMPDIR}/diff.list"
+    comm --nocheck-order -23 InstallOnly.list <(apt-mark showmanual|sort) | grep -Ev 'linux-image|linux-headers' > "\${TMPDIR}/diff.list"
     apt-get --simulate install \$(cat diff.list) |& awk '/^E: Unable to locate package / {print \$NF}' | sort > "\${TMPDIR}/diff.fail"
     comm --nocheck-order -23 "\${TMPDIR}/diff.list" "\${TMPDIR}/diff.fail" | xargs apt-get install