diff --git a/third_party/nixpkgs/pkgs/development/python-modules/cassandra-driver/default.nix b/third_party/nixpkgs/pkgs/development/python-modules/cassandra-driver/default.nix
index 32cf844cf0..ecb1edf595 100644
--- a/third_party/nixpkgs/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/third_party/nixpkgs/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -42,6 +42,5 @@ buildPythonPackage rec {
     description = "A Python client driver for Apache Cassandra";
     homepage = "http://datastax.github.io/python-driver";
     license = licenses.asl20;
-    broken = true; # geomet doesn't exist
   };
 }
diff --git a/third_party/nixpkgs/pkgs/development/python-modules/gevent/default.nix b/third_party/nixpkgs/pkgs/development/python-modules/gevent/default.nix
index bf066f5190..4eb5c7cdbb 100644
--- a/third_party/nixpkgs/pkgs/development/python-modules/gevent/default.nix
+++ b/third_party/nixpkgs/pkgs/development/python-modules/gevent/default.nix
@@ -4,12 +4,12 @@
 
 buildPythonPackage rec {
   pname = "gevent";
-  version = "20.9.0";
+  version = "20.5.2";
   format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "13aw9x6imsy3b369kfjblqiwfni69pp32m4r13n62r9k3l2lhvaz";
+    sha256 = "2756de36f56b33c46f6cc7146a74ba65afcd1471922c95b6771ce87b279d689c";
   };
 
   buildInputs = [ libev ];
diff --git a/third_party/nixpkgs/pkgs/development/python-modules/gipc/default.nix b/third_party/nixpkgs/pkgs/development/python-modules/gipc/default.nix
index 04dc8b0c06..3fe26f4a93 100644
--- a/third_party/nixpkgs/pkgs/development/python-modules/gipc/default.nix
+++ b/third_party/nixpkgs/pkgs/development/python-modules/gipc/default.nix
@@ -27,8 +27,6 @@ buildPythonPackage rec {
     '';
     homepage = "http://gehrcke.de/gipc";
     license = licenses.mit;
-    # gipc only has support for older versions of gevent
-    broken = versionOlder "1.6" gevent.version;
   };
 
 }