https://bugs.gentoo.org/833488
--- a/src/hardwareintegration/compositor/linux-dmabuf-unstable-v1/linuxdmabuf.h
+++ b/src/hardwareintegration/compositor/linux-dmabuf-unstable-v1/linuxdmabuf.h
@@ -44,6 +44,8 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
+#include <array>
+
 // compatibility with libdrm <= 2.4.74
 #ifndef DRM_FORMAT_RESERVED
 #define DRM_FORMAT_RESERVED           ((1ULL << 56) - 1)