diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 7a1ef557469..3ff156b9d2b 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -46,7 +46,6 @@ let
     configureScript = {
         armv6l-linux = "./Configure linux-armv4 -march=armv6";
         armv7l-linux = "./Configure linux-armv4 -march=armv7-a";
-        i686-linux = "./Configure linux-x86";
         x86_64-darwin  = "./Configure darwin64-x86_64-cc";
         x86_64-linux = "./Configure linux-x86_64";
         x86_64-solaris = "./Configure solaris64-x86_64-gcc";
diff --git a/pkgs/development/python-modules/twisted/default.nix b/pkgs/development/python-modules/twisted/default.nix
index 1c91dfc2b48..a87cacdc29e 100644
--- a/pkgs/development/python-modules/twisted/default.nix
+++ b/pkgs/development/python-modules/twisted/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , python
-, isPy27
 , zope_interface
 , incremental
 , automat
@@ -18,7 +17,6 @@
 buildPythonPackage rec {
   pname = "Twisted";
   version = "19.7.0";
-  disabled = isPy27; # ruamel namespace now conflicts in python27
 
   src = fetchPypi {
     inherit pname version;
@@ -41,7 +39,9 @@ buildPythonPackage rec {
   # http://twistedmatrix.com/documents/current/core/howto/plugin.html#auto3
   # and http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=477103 for
   # details.
-  postInstall = "$out/bin/twistd --help > /dev/null";
+  postFixup = ''
+    $out/bin/twistd --help > /dev/null
+  '';
 
   checkPhase = ''
     ${python.interpreter} -m unittest discover -s twisted/test