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-rw-r--r--nix/nix-daemon/guix-daemon.cc6
1 files changed, 6 insertions, 0 deletions
diff --git a/nix/nix-daemon/guix-daemon.cc b/nix/nix-daemon/guix-daemon.cc
index 0e72b1d219..459c794f5d 100644
--- a/nix/nix-daemon/guix-daemon.cc
+++ b/nix/nix-daemon/guix-daemon.cc
@@ -25,6 +25,8 @@
#include <stdlib.h>
#include <argp.h>
+#include <unistd.h>
+#include <sys/types.h>
/* Variables used by `nix-daemon.cc'. */
volatile ::sig_atomic_t blockInt;
@@ -176,6 +178,10 @@ main (int argc, char *argv[])
argp_parse (&argp, argc, argv, 0, 0, 0);
+ if (geteuid () == 0 && settings.buildUsersGroup.empty ())
+ fprintf (stderr, "warning: running as root is highly recommended, "
+ "unless `--build-users-group' is used\n");
+
argvSaved = argv;
run (nothing);
}