diff --git a/functions/infra/clickhouse_open.go b/functions/infra/clickhouse_open.go
index 8d69e4c4..d9549193 100644
--- a/functions/infra/clickhouse_open.go
+++ b/functions/infra/clickhouse_open.go
@@ -1,3 +1,5 @@
+//go:build !noclickhouse
+
 package infra
 
 import (
diff --git a/functions/infra/clickhouse_open_stub.go b/functions/infra/clickhouse_open_stub.go
new file mode 100644
index 00000000..5a09807e
--- /dev/null
+++ b/functions/infra/clickhouse_open_stub.go
@@ -0,0 +1,13 @@
+//go:build noclickhouse
+
+package infra
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+// ClickHouseOpen is a stub when built with the noclickhouse tag.
+func ClickHouseOpen(host string, port int, user, password, database string) (*sql.DB, error) {
+	return nil, fmt.Errorf("clickhouse_open: clickhouse support not compiled (built with noclickhouse tag)")
+}
diff --git a/functions/infra/duckdb_open.go b/functions/infra/duckdb_open.go
index 9a240a8c..7870b8dd 100644
--- a/functions/infra/duckdb_open.go
+++ b/functions/infra/duckdb_open.go
@@ -1,3 +1,5 @@
+//go:build !noduckdb
+
 package infra
 
 import (
diff --git a/functions/infra/duckdb_open_stub.go b/functions/infra/duckdb_open_stub.go
new file mode 100644
index 00000000..a11124f2
--- /dev/null
+++ b/functions/infra/duckdb_open_stub.go
@@ -0,0 +1,13 @@
+//go:build noduckdb
+
+package infra
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+// DuckDBOpen is a stub when built with the noduckdb tag.
+func DuckDBOpen(path string) (*sql.DB, error) {
+	return nil, fmt.Errorf("duckdb_open: duckdb support not compiled (built with noduckdb tag)")
+}