diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fb0bb4f..ec28bcb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -76,20 +76,16 @@ jobs:
             done
 
             mkdir -p ${DEB_DIR}
-            cat <<EOL > ${DEB_DIR}/control
-Package: ${PKG_NAME}
-Version: ${VERSION}
-Section: base
-Priority: optional
-Architecture: ${ARCH}
-Maintainer: You <you@example.com>
-Description: Custom NGINX build with modules and dependencies
-EOL
+            echo "Package: ${PKG_NAME}" > ${DEB_DIR}/control
+            echo "Version: ${VERSION}" >> ${DEB_DIR}/control
+            echo "Section: base" >> ${DEB_DIR}/control
+            echo "Priority: optional" >> ${DEB_DIR}/control
+            echo "Architecture: ${ARCH}" >> ${DEB_DIR}/control
+            echo "Maintainer: You <you@example.com>" >> ${DEB_DIR}/control
+            echo "Description: Custom NGINX build with modules and dependencies" >> ${DEB_DIR}/control
 
-            cat <<'POSTINST_EOF' > ${DEB_DIR}/postinst
-#!/bin/bash
-useradd -r -d /usr/local/nginx -s /bin/false nginx || true
-POSTINST_EOF
+            echo "#!/bin/bash" > ${DEB_DIR}/postinst
+            echo "useradd -r -d /usr/local/nginx -s /bin/false nginx || true" >> ${DEB_DIR}/postinst
             chmod 755 ${DEB_DIR}/postinst
 
             dpkg-deb --build ${PKG_DIR}