diff --git a/pkgs/nix-directory.nix b/pkgs/nix-directory.nix
index e72d7bc3..82c371e5 100644
--- a/pkgs/nix-directory.nix
+++ b/pkgs/nix-directory.nix
@@ -24,8 +24,8 @@ stdenv.mkDerivation {
   name = "nix-directory";
 
   src = builtins.fetchurl {
-    url = "https://nixos.org/releases/nix/nix-2.17.1/nix-2.17.1-${config.build.arch}-linux.tar.xz";
-    sha256 = "sha256:1kvar2xx6102674zrp8i912zijs3qp6h57k734s79p14h0zj1ns6";
+    url = "https://nixos.org/releases/nix/nix-2.20.4/nix-2.20.4-${config.build.arch}-linux.tar.xz";
+    sha256 = "sha256:10nk5dn5mhlql3842jn8ikvywcidgfjycfqcv7cg9i97lgi12x0q";
   };
 
   PROOT_NO_SECCOMP = 1; # see https://github.com/proot-me/PRoot/issues/106