--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nixpkgs-config.nix	Fri Jul 10 16:35:43 2020 +0200
@@ -0,0 +1,9 @@
+{
+  allowUnfree = true;
+  permittedInsecurePackages = [
+    "openssl-1.0.2u"
+    "postgresql-9.3.25"
+  ];
+
+}
+