diff --git a/cmd_format.c b/cmd_format.c
index bf175581..cffb8dc1 100644
--- a/cmd_format.c
+++ b/cmd_format.c
@@ -122,7 +122,7 @@ int cmd_format(int argc, char *argv[])
 	struct bch_opts fs_opts = bch2_parse_opts(fs_opt_strs);
 
 	while ((opt = getopt_long(argc, argv,
-				  "-L:U:fqh",
+				  "-L:U:g:fqh",
 				  format_opts,
 				  NULL)) != -1)
 		switch (opt) {
diff --git a/debian/bcachefs-tools.dirs b/debian/bcachefs-tools.dirs
deleted file mode 100644
index ea98e984..00000000
--- a/debian/bcachefs-tools.dirs
+++ /dev/null
@@ -1,2 +0,0 @@
-sbin/
-usr/share/man/man8/
diff --git a/debian/bcachefs-tools.postinst b/debian/bcachefs-tools.postinst
new file mode 100644
index 00000000..483b9619
--- /dev/null
+++ b/debian/bcachefs-tools.postinst
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+    configure)
+	if which update-initramfs >/dev/null; then
+	    update-initramfs -u
+	fi
+    ;;
+esac
+
diff --git a/debian/bcachefs-tools.postrm b/debian/bcachefs-tools.postrm
new file mode 100644
index 00000000..6b6fe8ac
--- /dev/null
+++ b/debian/bcachefs-tools.postrm
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+    remove)
+	if which update-initramfs >/dev/null; then
+	    update-initramfs -u
+	fi
+    ;;
+esac
+