From c7764773502a239b42a119cd2df38be14a8829ee Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 25 Feb 2015 20:15:26 +0100
Subject: [PATCH] haskell-generic-builder: update and jailbreak cabal files
 before patchPhase is run

The updated and jailbroken Cabal file must be in place before the
'patchPhase' hook is run, otherwise we cannot use that hook to patch the
Cabal file! Resolves https://github.com/NixOS/nixpkgs/issues/5922.

As an added bonus, this change makes the "jailbreakPhase" obsolete.
---
 .../haskell-modules/generic-builder.nix       | 25 +++++++------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 73851786f830..faf1ce4046e2 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -111,7 +111,7 @@ stdenv.mkDerivation ({
   name = "${optionalString hasActiveLibrary "haskell-"}${pname}-${version}";
 
   prePhases = ["setupCompilerEnvironmentPhase"];
-  preConfigurePhases = ["jailbreakPhase" "compileBuildDriverPhase"];
+  preConfigurePhases = ["compileBuildDriverPhase"];
   preInstallPhases = ["haddockPhase"];
 
   inherit src;
@@ -121,6 +121,14 @@ stdenv.mkDerivation ({
 
   LANG = "en_US.UTF-8";         # GHC needs the locale configured during the Haddock phase.
 
+  prePatch = optionalString (editedCabalFile != null) ''
+    echo "Replacing Cabal file with edited version ${newCabalFile}."
+    cp ${newCabalFile} ${pname}.cabal
+  '' + optionalString jailbreak ''
+    echo "Running jailbreak-cabal to lift version restrictions on build inputs."
+    ${jailbreak-cabal}/bin/jailbreak-cabal ${pname}.cabal
+  '' + prePatch;
+
   setupCompilerEnvironmentPhase = ''
     runHook preSetupCompilerEnvironment
 
@@ -155,20 +163,6 @@ stdenv.mkDerivation ({
     runHook postSetupCompilerEnvironment
   '';
 
-  jailbreakPhase = ''
-    runHook preJailbreak
-
-    ${optionalString (editedCabalFile != null) ''
-      echo "Replacing Cabal file with edited version ${newCabalFile}."
-      cp ${newCabalFile} ${pname}.cabal
-    ''}${optionalString jailbreak ''
-      echo "Running jailbreak-cabal to lift version restrictions on build inputs."
-      ${jailbreak-cabal}/bin/jailbreak-cabal ${pname}.cabal
-    ''}
-
-    runHook postJailbreak
-  '';
-
   compileBuildDriverPhase = ''
     runHook preCompileBuildDriver
 
@@ -283,7 +277,6 @@ stdenv.mkDerivation ({
 // optionalAttrs (configureFlags != []) { inherit configureFlags; }
 // optionalAttrs (patches != [])        { inherit patches; }
 // optionalAttrs (patchPhase != "")     { inherit patchPhase; }
-// optionalAttrs (prePatch != "")       { inherit prePatch; }
 // optionalAttrs (postPatch != "")      { inherit postPatch; }
 // optionalAttrs (preConfigure != "")   { inherit preConfigure; }
 // optionalAttrs (postConfigure != "")  { inherit postConfigure; }