diff --git a/flake.nix b/flake.nix
index 701316d..cc5a3dc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -35,6 +35,37 @@
           pkgs.rsyncy
         ];
       };
+
+      new-post = pkgs.writeShellApplication {
+        name = "new-post";
+
+        text = ''
+          if [ $# -lt 1 ]; then
+            echo "usage: $0 <slug> [<title> [<description>]]"
+            exit 1
+          fi
+
+          filename="$1.mdx"
+          title=''${2:-"CHANGEME"}
+          description=''${3:-"CHANGEME"}
+
+          if [ -e "site-src/$filename" ]; then
+            echo "$filename already exists!"
+            exit 2
+          fi
+
+          # TODO: don't hardcode timezone (%z doesn't quite work)
+          cat > "site-src/$filename" <<EOF
+          ---
+          title: $title
+          description: $description
+          tags: post,short
+          date: $(date +'%Y-%m-%d %H:%M:%S -5')
+          ---
+          bla bla bla
+          EOF
+        '';
+      };
     in
     {
       devShell = pkgs.mkShell {
@@ -48,7 +79,7 @@
         build = eleventy-shortcut { name = "build"; };
         serve = eleventy-shortcut { name = "serve"; args = ["--serve"]; };
         watch = eleventy-shortcut { name = "watch"; args = ["--watch"]; };
-        inherit deploy;
+        inherit deploy new-post;
       };
     }
   );