This is a breaking change, even if it is unlikely that anyone is relying
on it.
systemd System and Service Manager
+CHANGES WITH 262:
+
+ Feature Removals and Incompatible Changes:
+
+ * systemd-repart's MakeSymlinks= option now expands "%" specifiers in
+ the symlink target. Previously, these were only expanded in the
+ source.
+
CHANGES WITH 261:
Announcements of Future Feature Removals and Incompatible Changes: