diff --git a/pkgs/development/python-modules/metaphone/default.nix b/pkgs/development/python-modules/metaphone/default.nix
index c2f5201538f5..e167ee494a82 100644
--- a/pkgs/development/python-modules/metaphone/default.nix
+++ b/pkgs/development/python-modules/metaphone/default.nix
@@ -5,7 +5,8 @@ buildPythonPackage rec {
   version = "0.6";
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "Metaphone";
+    inherit version;
     sha256 = "09ysaczwh2rlsqq9j5fz7m4pq2fs0axp5vvivrpfrdvclvffl2xd";
   };
 
diff --git a/pkgs/development/python-modules/sphinx/default.nix b/pkgs/development/python-modules/sphinx/default.nix
index 59fd7465be3b..831c527af0e6 100644
--- a/pkgs/development/python-modules/sphinx/default.nix
+++ b/pkgs/development/python-modules/sphinx/default.nix
@@ -28,7 +28,8 @@ buildPythonPackage rec {
   pname = "sphinx";
   version = "1.7.9";
   src = fetchPypi {
-    inherit pname version;
+    pname = "Sphinx";
+    inherit version;
     sha256 = "217a7705adcb573da5bbe1e0f5cab4fa0bd89fd9342c9159121746f593c2d5a4";
   };
   LC_ALL = "en_US.UTF-8";