From baf91ea7d9ffab6d1f95395b7c2f724a2e349698 Mon Sep 17 00:00:00 2001
From: Matthieu Coudron <mcoudron@hotmail.com>
Date: Wed, 9 Jun 2021 23:56:48 +0200
Subject: [PATCH] pythonPackages: set mainProgram to pname by default

Calling `nix run poetry` or another python package usually fails
because of the "pythonX" prefix in name.
Adjust mainProgram to ignore that prefix.
---
 pkgs/development/interpreters/python/mk-python-derivation.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 4917b167046..963073df620 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -176,6 +176,8 @@ let
       # default to python's platforms
       platforms = python.meta.platforms;
       isBuildPythonPackage = python.meta.platforms;
+    } // lib.optionalAttrs (attrs?pname) {
+      mainProgram = attrs.pname;
     } // meta;
   } // lib.optionalAttrs (attrs?checkPhase) {
     # If given use the specified checkPhase, otherwise use the setup hook.