upstream report:
https://gitlab.gnome.org/GNOME/vte/-/issues/342

diff --git a/src/missing.hh b/src/missing.hh
index d5d0484..5738813 100644
--- a/src/missing.hh
+++ b/src/missing.hh
@@ -35,6 +35,7 @@ char* strchrnul(char const* s,
 #endif
 
 #ifdef __linux__
+#include <sys/syscall.h>
 
 /* BEGIN
  * The following is copied from systemd/src/basic/missing_syscall_def.h (LGPL2.1+)