diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 0e17410a21dc..1b5ff3a3f25a 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -3,14 +3,17 @@
 with beam; {
   lib = callPackage ../development/beam-modules/lib.nix { };
 
+  # R24 is the default version.
+  # The main switch to change default Erlang version.
+  defaultVersion = "erlangR24";
+
   # Each
   interpreters = with beam.interpreters; {
 
-    # R24 is the default version.
-    erlang = erlangR24; # The main switch to change default Erlang version.
-    erlang_odbc = erlangR24_odbc;
-    erlang_javac = erlangR24_javac;
-    erlang_odbc_javac = erlangR24_odbc_javac;
+    erlang = beam.interpreters.${defaultVersion};
+    erlang_odbc = beam.interpreters."${defaultVersion}_odbc";
+    erlang_javac = beam.interpreters."${defaultVersion}_javac";
+    erlang_odbc_javac = beam.interpreters."${defaultVersion}_odbc_javac";
 
     # Standard Erlang versions, using the generic builder.
 
@@ -98,7 +101,7 @@ with beam; {
   # appropriate Erlang/OTP version.
   packages = {
     # Packages built with default Erlang version.
-    erlang = packagesWith interpreters.erlang;
+    erlang = packages.${defaultVersion};
 
     erlangR24 = packagesWith interpreters.erlangR24;
     erlangR23 = packagesWith interpreters.erlangR23;