From 7488e5e7dbc5bcf749d493efc985cb7053430538 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Claes=20Wallin=20=28=E9=9F=8B=E5=98=89=E8=AA=A0=29?=
 <claes.wallin@greatsinodevelopment.com>
Date: Tue, 14 Aug 2018 13:15:45 +0800
Subject: [PATCH] Problem: raco test is slower than non-nix raco test

raco test still breaks inside Nix, but running it on the nix derivation works.

However, it's 2-3x slower than non-nix raco test with just full racket
and raco-linked fractalide. Is it because if the huge links.rktd? If
so, flattening should help.

Solution: Add a flattened version of fractalide-tests to find out.
---
 pkgs/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/default.nix b/pkgs/default.nix
index e6d21232..6ca27e42 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -64,6 +64,10 @@ pkgs {
       } ''
         racket -l- raco test ${fractalide-tests-pkg.env}/share/racket/pkgs/*/modules/rkt/rkt-fbp/agents
       '';
+
+      fractalide-tests-flat = fractalide-tests.overrideAttrs (oldAttrs: {
+        buildInputs = [ fractalide.override { flat = true; } ];
+      });
     })
   ];
 }