diff --git a/mkosi/mkosi.sanitizers/mkosi.postinst b/mkosi/mkosi.sanitizers/mkosi.postinst
index 1184331254..88ba2c2bc0 100755
--- a/mkosi/mkosi.sanitizers/mkosi.postinst
+++ b/mkosi/mkosi.sanitizers/mkosi.postinst
@@ -84,6 +84,7 @@ wrap=(
     mdadm
     mkfs.btrfs
     mksquashfs
+    mount
     multipath
     multipathd
     nvme
@@ -99,6 +100,7 @@ wrap=(
     su
     tar
     tgtd
+    umount
     unix_chkpwd
     useradd
     userdel