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-rw-r--r--config-daemon.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/config-daemon.ac b/config-daemon.ac
index a6cf29ca42..f96cc8f7ac 100644
--- a/config-daemon.ac
+++ b/config-daemon.ac
@@ -76,7 +76,7 @@ if test "x$guix_build_daemon" = "xyes"; then
 
   dnl Chroot support.
   AC_CHECK_FUNCS([chroot unshare])
-  AC_CHECK_HEADERS([sched.h sys/param.h sys/mount.h tr1/unordered_set])
+  AC_CHECK_HEADERS([sched.h sys/param.h sys/mount.h sys/syscall.h])
 
   if test "x$ac_cv_func_chroot" != "xyes"; then
     AC_MSG_ERROR(['chroot' function missing, bailing out])