fix

drone.yml

         tar -xf "$${PKG_RELEASE_DIR}/$${PKG_DEB_ARCHIVE}" -C "$${PKG_BUILD_DIR}" --strip 1 &&
         cd "$${PKG_BUILD_DIR}" &&
         export MAKEFLAGS="$${MAKEFLAGS}" &&
-        [ "$${PKG_ARCH}" -ne "${PKG_BUILDHOST_ARCH} ] && export CC=arm-linux-gnueabihf-gcc || true &&
+        [ "$${PKG_ARCH}" -ne "$${PKG_BUILDHOST_ARCH}" ] && export CC="arm-linux-gnueabihf-gcc" || true &&
         make &&
         tar --exclude='./.*'
           --transform "s/\./$${PKG_RELEASE_ARCHIVE_ROOT}/"