diff --git a/browse/scripts/build-node-server.sh b/browse/scripts/build-node-server.sh
index 342ac64c7..c7b1b09b7 100755
--- a/browse/scripts/build-node-server.sh
+++ b/browse/scripts/build-node-server.sh
@@ -8,6 +8,11 @@
 set -e
 
 GSTACK_DIR="$(cd "$(dirname "$0")/../.." && pwd)"
+# Windows (MSYS/Git Bash): convert to a Windows-style path — Bun cannot open
+# MSYS /c/... absolute paths ("FileNotFound opening root directory").
+case "$(uname -s)" in
+  MINGW*|MSYS*|CYGWIN*) GSTACK_DIR="$(cygpath -m "$GSTACK_DIR")" ;;
+esac
 SRC_DIR="$GSTACK_DIR/browse/src"
 DIST_DIR="$GSTACK_DIR/browse/dist"
 mkdir -p "$DIST_DIR"