From b7f504812b14a706e5862a2a14fb74700f289c34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Thu, 28 Nov 2019 11:10:47 +0000
Subject: [PATCH] perf: build with python3

---
 pkgs/os-specific/linux/kernel/perf.nix | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/pkgs/os-specific/linux/kernel/perf.nix b/pkgs/os-specific/linux/kernel/perf.nix
index 1e5c987d508b..37b728bde887 100644
--- a/pkgs/os-specific/linux/kernel/perf.nix
+++ b/pkgs/os-specific/linux/kernel/perf.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kernel, elfutils, python, perl, newt, slang, asciidoc, xmlto, makeWrapper
+{ lib, stdenv, kernel, elfutils, python2, python3, perl, newt, slang, asciidoc, xmlto, makeWrapper
 , docbook_xsl, docbook_xml_dtd_45, libxslt, flex, bison, pkgconfig, libunwind, binutils
 , libiberty, audit, libbfd, libopcodes, openssl, systemtap, numactl
 , zlib, withGtk ? false, gtk2 ? null
@@ -36,12 +36,13 @@ stdenv.mkDerivation {
   # perf refers both to newt and slang
   nativeBuildInputs = [
     asciidoc xmlto docbook_xsl docbook_xml_dtd_45 libxslt
-    flex bison libiberty audit makeWrapper pkgconfig python perl
+    flex bison libiberty audit makeWrapper pkgconfig
   ];
   buildInputs = [
     elfutils newt slang libunwind libbfd zlib openssl systemtap.stapBuild numactl
-    libopcodes
-  ] ++ stdenv.lib.optional withGtk gtk2;
+    libopcodes python3 perl
+  ] ++ stdenv.lib.optional withGtk gtk2
+    ++ (if (versionAtLeast kernel.version "4.19") then [ python3 ] else [ python2 ]);
 
   # Note: we don't add elfutils to buildInputs, since it provides a
   # bad `ld' and other stuff.