diff --git a/README.md b/README.md
index e79b751..89c8ea5 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,10 @@ This repo uses the following tools for code quality:
 - **deadnix** - Finds unused code in Nix files.
 - **statix** - Checks Nix code for common issues and style problems.
 
-Pre-commit hooks are configured in `.pre-commit-config.yaml` and run automatically before commits. CI validation is defined in `.github/workflows/validate.yml`.
+Pre-commit hooks are configured in `.pre-commit-config.yaml` and run automatically before commits. 
+Run `pre-commit install` after checkout to make sure it gets used.
+
+CI validation is defined in `.github/workflows/validate.yml` and mirrors what is done by pre-commit.
 
 ## Historical bits
 
diff --git a/modules/hosts/darwin/default.nix b/modules/hosts/darwin/default.nix
index 1d49aef..8cb4d8e 100644
--- a/modules/hosts/darwin/default.nix
+++ b/modules/hosts/darwin/default.nix
@@ -21,7 +21,6 @@
       bandwhich
       coreutils
       hugo
-      mas
       nmap
       openjdk
       sops
@@ -45,6 +44,7 @@
       "fastfetch"
       "ffmpeg"
       #"firefox-profile-switcher-connector" # having had this on seems to mean I need to toggle browser.profiles.enabled to true in about:config for the new built in version
+      "mas"
       "ssh-askpass"
       "telnet"
     ];