feat(darwin): add makkie host config and parameterize per-machine settings

1 files changed, 24 insertions, 2 deletions

diff --git a/INSTALL.md b/INSTALL.md
index 805b776..024695d 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -62,8 +62,16 @@ installed yet. After the first switch, git rewrites the HTTPS remote to SSH
 
 ### 5. First switch (bootstrap nix-darwin)
 
+Pick the configuration that matches the machine — each one pins its own username,
+so switching with the wrong attribute fails during activation:
+
+| Attribute | Machine | User |
+| --------- | ------- | ---- |
+| `makkie`  | MacBook Pro (sets its hostname to `makkie`) | `simenandre` |
+| `default` | Older MacBook Pro | `cobraz` |
+
 ```shell
-sudo nix run nix-darwin#darwin-rebuild -- switch --flake .#default
+sudo nix run nix-darwin#darwin-rebuild -- switch --flake .#makkie
 ```
 
 This is the long one: it installs every Homebrew cask, the Mac App Store apps,
@@ -73,7 +81,21 @@ for your password, and expect to approve a few system dialogs.
 Subsequent switches use the installed binary:
 
 ```shell
-sudo darwin-rebuild switch --flake .#default
+sudo darwin-rebuild switch --flake .#makkie
+```
+
+The `rebuild` and `update` aliases already carry the right attribute for the
+machine they were built for, so after the first switch you can just run
+`rebuild`.
+
+Adding another Mac later means one entry in `flake.nix`:
+
+```nix
+"newhost" = mkDarwin {
+  username = "simenandre";
+  flakeAttr = "newhost";
+  hostName = "newhost";
+};
 ```
 
 Restart the terminal (or log out and back in) so the new zsh config, `PATH`, and