diff --git a/bin/doom b/bin/doom
index edf978ea7..8104260a8 100755
--- a/bin/doom
+++ b/bin/doom
@@ -271,7 +271,7 @@ SEE ALSO:
     (defcli-autoload! ((profiles profile)))
     (defcli-autoload! ((upgrade up)))
     (defcli-autoload! (env))
-    (defcli-autoload! ((build b purge p rollback)) "packages")
+    (defcli-autoload! ((build b purge p gc rollback)) "packages")
     (defcli-autoload! ((install i)))
 
     ;; TODO Post-3.0 commands
diff --git a/lisp/cli/packages.el b/lisp/cli/packages.el
index 17f5eaf7e..26018ae91 100644
--- a/lisp/cli/packages.el
+++ b/lisp/cli/packages.el
@@ -15,9 +15,10 @@
 
 (defcli-obsolete! ((build b)) (sync "--rebuild") "v3.0.0")
 
+(defcli-obsolete! ((purge p)) (gc) "v3.0.0")
 
 ;; TODO Rename to "doom gc" and move to its own file
-(defcli! ((purge p))
+(defcli! (gc)
     ((nobuilds-p  ("-b" "--no-builds")  "Don't purge unneeded (built) packages")
      (noelpa-p    ("-p" "--no-elpa")    "Don't purge ELPA packages")
      (norepos-p   ("-r" "--no-repos")   "Don't purge unused straight repos")
diff --git a/lisp/cli/sync.el b/lisp/cli/sync.el
index b767c2a3a..f71fe8c8d 100644
--- a/lisp/cli/sync.el
+++ b/lisp/cli/sync.el
@@ -24,7 +24,7 @@
     ((noenvvar? ("-e") "Don't regenerate the envvar file")
      (update?   ("-u") "Update all installed packages after syncing")
      (noupdate? ("-U") "Don't update any packages")
-     (purge?    ("-p") "Purge orphaned package repos & regraft them")
+     (purge?    ("--gc") "Purge orphaned package repos & regraft them")
      (jobs      ("-j" "--jobs" num) "How many threads to use for native compilation")
      (rebuild?  ("-b" "--rebuild") "Rebuild, compile, & symlink installed packages")
      (auto?     ("-B") "Rebuild packages, but only if necessary")