diff --git a/.mkosi/mkosi.debian b/.mkosi/mkosi.debian
index fa2aa1182d..bb2a0bd9fd 100644
--- a/.mkosi/mkosi.debian
+++ b/.mkosi/mkosi.debian
@@ -32,9 +32,9 @@ RootSize=2G
 [Packages]
 BuildPackages=
         acl
-        diffutils
         docbook-xml
         docbook-xsl
+        g++
         gcc
         git
         gnu-efi
@@ -53,7 +53,7 @@ BuildPackages=
         libfdisk-dev
         libgcrypt20-dev
         libgnutls28-dev
-        libidn2-dev
+        libidn2-0-dev
         libkmod-dev
         liblzma-dev
         liblz4-dev