diff -urN --no-dereference libffi-clean/src/closures.c libffi-workdir/src/closures.c
--- libffi-clean/src/closures.c
+++ libffi-workdir/src/closures.c
@@ -139,6 +139,9 @@
    executable memory. */
 #  define FFI_MMAP_EXEC_WRIT 1
 # endif
+# if defined(__astral__)
+#  define FFI_MMAP_EXEC_WRIT 1
+# endif
 #endif
 
 #if FFI_MMAP_EXEC_WRIT && !defined FFI_MMAP_EXEC_SELINUX