diff --git a/modules/scripts/datepath.nix b/modules/scripts/datepath.nix
new file mode 100644
index 00000000..fa2b4e4d
--- /dev/null
+++ b/modules/scripts/datepath.nix
@@ -0,0 +1,26 @@
+{  withSystem, ... }:
+
+let
+  name = "datepath";
+in
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      packages.${name} = pkgs.writeShellApplication {
+        inherit name;
+
+        runtimeInputs = with pkgs; [ coreutils ];
+
+        text = ''date "+%4Y/%m/%d" "-d ''${*:-now}"'';
+      };
+    };
+
+  flake.modules.homeManager.base =
+    { pkgs, ... }:
+    {
+      home.packages = [
+        (withSystem pkgs.system (psArgs: psArgs.config.packages.${name}))
+      ];
+    };
+}
diff --git a/modules/scripts/onchange.nix b/modules/scripts/onchange.nix
new file mode 100644
index 00000000..78e36bf4
--- /dev/null
+++ b/modules/scripts/onchange.nix
@@ -0,0 +1,35 @@
+{ withSystem, ... }:
+
+let
+  name = "onchange";
+in
+{
+  perSystem =
+    { pkgs, ... }:
+    with pkgs;
+    {
+      packages.${name} = writeShellApplication {
+        inherit name;
+
+        runtimeInputs = [
+          coreutils
+          entr
+        ];
+
+        text = ''
+          PATTERN="$1"
+          shift 1
+
+          find . -path "$PATTERN" -type f | entr -cs "$@"
+        '';
+      };
+    };
+
+  flake.modules.homeManager.base =
+    { pkgs, ... }:
+    {
+      home.packages = [
+        (withSystem pkgs.system (psArgs: psArgs.config.packages.${name}))
+      ];
+    };
+}
diff --git a/modules/scripts/ptest.nix b/modules/scripts/ptest.nix
new file mode 100644
index 00000000..a0cfa6eb
--- /dev/null
+++ b/modules/scripts/ptest.nix
@@ -0,0 +1,42 @@
+{ withSystem, ... }:
+
+let
+  name = "ptest";
+in
+{
+  perSystem =
+    psArgs@{ pkgs, ... }:
+    with pkgs;
+    {
+      packages.${name} = writeShellApplication {
+        inherit name;
+
+        runtimeInputs = [
+          psArgs.config.packages.onchange
+        ];
+
+        text = ''
+          command="phpunit"
+          args=("--colors")
+
+          bin="vendor/bin"
+
+          if [[ -x "$bin/pest" ]]; then
+            command="pest"
+            args=()
+          fi
+
+          onchange "**/*.php" \
+            "$bin/$command ''${args[*]} $*"
+        '';
+      };
+    };
+
+  flake.modules.homeManager.base =
+    { pkgs, ... }:
+    {
+      home.packages = [
+        (withSystem pkgs.system (psArgs: psArgs.config.packages.${name}))
+      ];
+    };
+}
diff --git a/packages/create-script.nix b/packages/create-script.nix
index 1753e45f..840018fd 100755
--- a/packages/create-script.nix
+++ b/packages/create-script.nix
@@ -7,9 +7,7 @@ pkgs.writeShellApplication {
     cat > "$1" << EOF
     #!/usr/bin/env bash
 
-    set -o errexit
-    set -o nounset
-    set -o pipefail
+    set -euo pipefail
 
 
     EOF