From 1cbb0feae596544af67bec58c8282de9e31d807b Mon Sep 17 00:00:00 2001
From: happysalada <raphael@megzari.com>
Date: Mon, 27 Sep 2021 09:12:26 +0900
Subject: [PATCH] erlang: fix nix-env version confusion

---
 .../interpreters/erlang/generic-builder.nix            | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/interpreters/erlang/generic-builder.nix b/pkgs/development/interpreters/erlang/generic-builder.nix
index 3d5c692930b6..f4f7d6483545 100644
--- a/pkgs/development/interpreters/erlang/generic-builder.nix
+++ b/pkgs/development/interpreters/erlang/generic-builder.nix
@@ -84,9 +84,13 @@ let
 
 in
 stdenv.mkDerivation ({
-  name = "${baseName}-${version}"
-    + optionalString javacSupport "-javac"
-    + optionalString odbcSupport "-odbc";
+  # name is used instead of pname to
+  # - not have to pass pnames as argument
+  # - have a separate pname for erlang (main module)
+  name = "${baseName}"
+    + optionalString javacSupport "_javac"
+    + optionalString odbcSupport "_odbc"
+    + "-${version}";
 
   inherit src version;