diff --git a/Makefile b/Makefile
index bd5c4638b0..a0c9147539 100644
--- a/Makefile
+++ b/Makefile
@@ -213,6 +213,9 @@ neon-pg-ext-%: postgres-%
 
 .PHONY: neon-pg-clean-ext-%
 neon-pg-clean-ext-%:
+	$(MAKE) PG_CONFIG=$(POSTGRES_INSTALL_DIR)/$*/bin/pg_config \
+	-C $(POSTGRES_INSTALL_DIR)/build/lsm3-$* \
+	-f $(ROOT_PROJECT_DIR)/pgxn/lsm3/Makefile clean
 	$(MAKE) PG_CONFIG=$(POSTGRES_INSTALL_DIR)/$*/bin/pg_config \
 	-C $(POSTGRES_INSTALL_DIR)/build/neon-$* \
 	-f $(ROOT_PROJECT_DIR)/pgxn/neon/Makefile clean
diff --git a/compute/compute-node.Dockerfile b/compute/compute-node.Dockerfile
index d5483018b4..40864cb479 100644
--- a/compute/compute-node.Dockerfile
+++ b/compute/compute-node.Dockerfile
@@ -1607,6 +1607,9 @@ RUN make -j $(getconf _NPROCESSORS_ONLN) \
     make -j $(getconf _NPROCESSORS_ONLN) \
         -C pgxn/neon_test_utils \
         -s install && \
+    make -j $(getconf _NPROCESSORS_ONLN) \
+        -C pgxn/lsm3 \
+        -s install && \
     make -j $(getconf _NPROCESSORS_ONLN) \
         -C pgxn/neon_rmgr \
         -s install