diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index d886e9a56fa4..13163419b73e 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -64,6 +64,7 @@ rec {
     ''
       mknod -m 666 ${dev}/null    c 1 3
       mknod -m 666 ${dev}/zero    c 1 5
+      mknod -m 666 ${dev}/full    c 1 7
       mknod -m 666 ${dev}/random  c 1 8
       mknod -m 666 ${dev}/urandom c 1 9
       mknod -m 666 ${dev}/tty     c 5 0