diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index ffafe88cc7f8..f0a049bb4b23 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -39,17 +39,17 @@ let
         # BEAM-based languages.
         elixir = elixir_1_4;
 
-        elixir_1_5_rc = lib.callElixir ../interpreters/elixir/1.5.nix "18" {
+        elixir_1_5_rc = lib.callElixir ../interpreters/elixir/1.5.nix {
                        inherit rebar erlang;
                        debugInfo = true;
                      };
 
-        elixir_1_4 = lib.callElixir ../interpreters/elixir/1.4.nix "18" {
+        elixir_1_4 = lib.callElixir ../interpreters/elixir/1.4.nix {
                        inherit rebar erlang;
                        debugInfo = true;
                      };
 
-        elixir_1_3 = lib.callElixir ../interpreters/elixir/1.3.nix "18" {
+        elixir_1_3 = lib.callElixir ../interpreters/elixir/1.3.nix {
                        inherit rebar erlang;
                        debugInfo = true;
                      };
diff --git a/pkgs/development/beam-modules/lib.nix b/pkgs/development/beam-modules/lib.nix
index 43c1a3e45d52..da21cc17bf2f 100644
--- a/pkgs/development/beam-modules/lib.nix
+++ b/pkgs/development/beam-modules/lib.nix
@@ -47,7 +47,6 @@ rec {
   specific data.
 
   drv: package containing version-specific args;
-  vsn: minimum OTP version that Elixir will build on;
   builder: generic builder for all Erlang versions;
   args: arguments merged into version-specific args, used mostly to customize
         dependencies;
@@ -57,7 +56,7 @@ rec {
   Please note that "mkDerivation" defined here is the one called from 1.4.nix
   and similar files.
   */
-  callElixir = drv: vsn: args:
+  callElixir = drv: args:
     let
       inherit (stdenv.lib) versionAtLeast;
       builder = callPackage ../interpreters/elixir/generic-builder.nix args;