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-rw-r--r--pkgs/development/python-modules/psycopg2/default.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index 604431612a097..4e0a2771e9a8e 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -4,6 +4,8 @@ buildPythonPackage rec {
   pname = "psycopg2";
   version = "2.8.6";
 
+  # Extension modules don't work well with PyPy. Use psycopg2cffi instead.
+  # c.f. https://github.com/NixOS/nixpkgs/pull/104151#issuecomment-729750892
   disabled = isPyPy;
 
   src = fetchPypi {