diff --git a/make-dos-zip.sh b/make-dos-zip.sh
old mode 100644
new mode 100755
index 5dbbd2c..5cbf732
--- a/make-dos-zip.sh
+++ b/make-dos-zip.sh
@@ -20,7 +20,7 @@ set -euo pipefail
 
 VERSION="${1:-$(date +%Y%m%d)}"
 ZIP_NAME="cnotes-v${VERSION}-dos.zip"
-BUILD_DIR="build"
+BUILD_DIR="BUILD"
 DIST_DIR="dist-dos"
 
 # Colors
@@ -32,12 +32,12 @@ echo -e "${GREEN}Packaging DOS release: ${ZIP_NAME}${NC}"
 
 # 1. Check required files exist in build/
 REQUIRED_FILES=(
-    "cnadd.exe"
-    "cndump.exe"
-    "cncount.exe"
-    "cndel.exe"
-    "cnfind.exe"
-    "cnhelp.exe"
+    "CNADD.EXE"
+    "CNDUMP.EXE"
+    "CNCOUNT.EXE"
+    "CNDEL.EXE"
+    "CNFIND.EXE"
+    "CNHELP.EXE"
     "INSTALL.BAT"
     "READ-DOS.TXT"
 )
@@ -63,7 +63,7 @@ mkdir -p "${DIST_DIR}"
 
 # 3. Copy files to staging
 echo "Staging files..."
-cp "${BUILD_DIR}"/*.exe "${DIST_DIR}"/
+cp "${BUILD_DIR}"/*.EXE "${DIST_DIR}"/
 cp "${BUILD_DIR}/INSTALL.BAT" "${DIST_DIR}"/
 cp "$$   {BUILD_DIR}/READ-DOS.TXT" "   $${DIST_DIR}"/ 2>/dev/null || {
     echo -e "$$   {RED}Warning: READ-DOS.TXT not found in build/ (optional but recommended)   $${NC}"