diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index aa0d18e4455..207965a6217 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1099,7 +1099,7 @@ rec {
 
   qcmm = import ../development/compilers/qcmm {
     lua   = lua4;
-    ocaml = ocaml_alts.v_3_08_0;
+    ocaml = builtins.getAttr "3.08.0" ocaml_alts;
     inherit fetchurl stdenv mk noweb groff;
   };
 
@@ -1212,7 +1212,7 @@ rec {
 
   pyrexFun = lib.sumArgs (import ../development/interpreters/pyrex) {
   	inherit fetchurl stdenv stringsWithDeps lib builderDefs;
-	python = python_alts.v_2_5;
+	python = builtins.getAttr "2.5" python_alts;
   };
 
   pyrex = pyrexFun {
@@ -3851,7 +3851,7 @@ rec {
 
   pythonmagick = import ../applications/graphics/PythonMagick {
     inherit fetchurl stdenv pkgconfig imagemagick boost;
-    python = python_alts.v_2_5;
+    python = builtins.getAttr "2.5" python_alts;
   };
 
   ratpoison = import ../applications/window-managers/ratpoison {