From e21e5cbee9d3f321f53d6f8fddf3539433a9b09c Mon Sep 17 00:00:00 2001
From: Denis Lehmann <denis@opaque.tech>
Date: Fri, 10 Apr 2020 09:31:56 +0200
Subject: [PATCH] update python to use virtualenv

---
 python_environment/default.nix | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/python_environment/default.nix b/python_environment/default.nix
index bd27798..f1f781e 100644
--- a/python_environment/default.nix
+++ b/python_environment/default.nix
@@ -3,16 +3,16 @@ with import <nixpkgs> {};
 stdenv.mkDerivation {
   name = "myPythonEnv";
   buildInputs = with pkgs; [
-    python36Full
-    python36Packages.virtualenv
-    python36Packages.pip
+    python37Full
+    python37Packages.virtualenv
   ];
   src = null;
   shellHook = ''
-    # set SOURCE_DATE_EPOCH so that we can use python wheels
-    SOURCE_DATE_EPOCH=$(date +%s)
-    virtualenv --no-setuptools venv
-    export PATH=$PWD/venv/bin:$PATH
+    if [ ! -d .venv ]; then
+      python -m venv .venv
+    fi
+    source .venv/bin/activate
+    pip install --upgrade pip
     if [ -s requirements.txt ]; then
       pip install -r requirements.txt
     fi