diff --git a/mkosi.conf.d/ppa.daily.conf b/mkosi.conf.d/ppa.daily.conf
index cd8ca2327..565ac50cf 100644
--- a/mkosi.conf.d/ppa.daily.conf
+++ b/mkosi.conf.d/ppa.daily.conf
@@ -6,3 +6,6 @@ Profiles=|proposed
 SandboxTrees=
     %D/repos/daily
     %D/repos/common-files
+ToolsTreeSandboxTrees=
+    %D/repos/daily
+    %D/repos/common-files
diff --git a/mkosi.conf.d/ppa.stable.conf b/mkosi.conf.d/ppa.stable.conf
index ceae510cd..3064ac72a 100644
--- a/mkosi.conf.d/ppa.stable.conf
+++ b/mkosi.conf.d/ppa.stable.conf
@@ -5,3 +5,6 @@ Profiles=stable
 SandboxTrees=
     %D/repos/stable
     %D/repos/common-files
+ToolsTreeSandboxTrees=
+    %D/repos/stable
+    %D/repos/common-files