diff --git a/repos/os/recipes/api/genode_c_api/content.mk b/repos/os/recipes/api/genode_c_api/content.mk
index efb2cf80a1..21bd009dd3 100644
--- a/repos/os/recipes/api/genode_c_api/content.mk
+++ b/repos/os/recipes/api/genode_c_api/content.mk
@@ -1,6 +1,9 @@
-content: include/genode_c_api LICENSE
+MIRROR_FROM_REP_DIR := include/genode_c_api \
+                       src/lib/genode_c_api
 
-include/genode_c_api:
+content: $(MIRROR_FROM_REP_DIR) LICENSE
+
+$(MIRROR_FROM_REP_DIR):
 	$(mirror_from_rep_dir)
 
 LICENSE: