diff --git a/plans.script.nix b/plans.script.nix
index 689ce09..7526103 100644
--- a/plans.script.nix
+++ b/plans.script.nix
@@ -6,7 +6,8 @@ pkgs.writeShellScriptBin "plans" ''
 		echo "- $2" >> ~/sync/plans.txt
 	fi
 	if [ "$1" = "done" ] ; then
-		tail -n"$(($(wc -l < ~/sync/plans.txt) - 1))" ~/sync/plans.txt
+		tail -n"$(($(wc -l < ~/sync/plans.txt) - 1))" ~/sync/plans.txt > ~/plans.txt.tmp
+		mv ~/plans.txt.tmp ~/sync/plans.txt
 	fi
 	if [ "$1" = "edit" ] ; then
 		hx ~/sync/plans.txt