From c2fd1a9418da0327bad0a331036bb64a70bab7b4 Mon Sep 17 00:00:00 2001
From: Emily <vcs@emily.moe>
Date: Sat, 8 Feb 2020 15:31:51 +0000
Subject: [PATCH] icestorm: use passthru attribute

---
 pkgs/development/tools/icestorm/default.nix | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/tools/icestorm/default.nix b/pkgs/development/tools/icestorm/default.nix
index a7af74a8dc8f..58ccb5d4cef4 100644
--- a/pkgs/development/tools/icestorm/default.nix
+++ b/pkgs/development/tools/icestorm/default.nix
@@ -13,8 +13,10 @@ stdenv.mkDerivation rec {
   pname = "icestorm";
   version = "2019.09.13";
 
-  pythonPkg = if usePyPy then pypy3 else python3;
-  pythonInterp = pythonPkg.interpreter;
+  passthru = rec {
+    pythonPkg = if usePyPy then pypy3 else python3;
+    pythonInterp = pythonPkg.interpreter;
+  };
 
   src = fetchFromGitHub {
     owner  = "cliffordwolf";
@@ -24,7 +26,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ pythonPkg libftdi1 ];
+  buildInputs = [ passthru.pythonPkg libftdi1 ];
   makeFlags = [ "PREFIX=$(out)" ];
 
   enableParallelBuilding = true;
@@ -39,12 +41,12 @@ stdenv.mkDerivation rec {
       --replace /usr/local/share "$out/share"
 
     for x in icefuzz/Makefile icebox/Makefile icetime/Makefile; do
-      substituteInPlace "$x" --replace python3 "${pythonInterp}"
+      substituteInPlace "$x" --replace python3 "${passthru.pythonInterp}"
     done
 
     for x in $(find . -type f -iname '*.py'); do
       substituteInPlace "$x" \
-        --replace '/usr/bin/env python3' '${pythonInterp}'
+        --replace '/usr/bin/env python3' '${passthru.pythonInterp}'
     done
   '';