diff --git a/ci/scripts/proto/generate.sh b/ci/scripts/proto/generate.sh
index 8bb4477..be6440f 100755
--- a/ci/scripts/proto/generate.sh
+++ b/ci/scripts/proto/generate.sh
@@ -7,6 +7,7 @@ REPO_ROOT="$(cd "${SCRIPT_DIR}/../../.." && pwd)"
 API_DIR="${REPO_ROOT}/api"
 PROTO_DIR="./proto"
 PROTOC_BIN="${PROTOC:-protoc}"
+PROTOC_INCLUDE="${PROTOC_INCLUDE:-/usr/include}"
 
 if ! command -v "${PROTOC_BIN}" >/dev/null 2>&1; then
   echo "[proto] protoc binary not found" >&2
@@ -30,6 +31,7 @@ generate_go() {
   shift
   mkdir -p "${out_dir}"
   "${PROTOC_BIN}" \
+    -I="${PROTOC_INCLUDE}" \
     -I="${PROTO_DIR}" \
     --go_out="${out_dir}" \
     --go_opt=paths=source_relative \
@@ -41,6 +43,7 @@ generate_go_with_grpc() {
   shift
   mkdir -p "${out_dir}"
   "${PROTOC_BIN}" \
+    -I="${PROTOC_INCLUDE}" \
     -I="${PROTO_DIR}" \
     --go_out="${out_dir}" \
     --go_opt=paths=source_relative \