diff --git a/nixos/openssl-111k.nix b/nixos/openssl-111k.nix
index 935357a6a9a49fa32baff0e39f25258c6c864c2d..86d355936ba3bf3f1e18113293281f30f5e430c0 100644
--- a/nixos/openssl-111k.nix
+++ b/nixos/openssl-111k.nix
@@ -15,7 +15,7 @@ self: super: rec {
       pyopenssl = python-super.callPackage ./pkgs/pyopenssl.nix { };
       cryptography = python-super.cryptography.overridePythonAttrs (old: {
         version = "3.2.1";
-        src = fetchPypi {
+        src = python-super.pkgs.fetchPypi {
           version = "3.2.1";
           pname = "cryptography-3.2.1";
           sha256 = "1inlnr36kl36551c9rcad99jmhk81v33by3glkadwdcgmi17fd75";
@@ -29,7 +29,7 @@ self: super: rec {
       pyopenssl = python-super.callPackage ./pkgs/pyopenssl.nix { };
       cryptography = python-super.cryptography.overridePythonAttrs (old: {
         version = "3.2.1";
-        src = fetchPypi {
+        src = python-super.pkgs.fetchPypi {
           version = "3.2.1";
           pname = "cryptography-3.2.1";
           sha256 = "1inlnr36kl36551c9rcad99jmhk81v33by3glkadwdcgmi17fd75";