From 7c76fbf6afbb7a1b0b31fca5f315a20412aa2d79 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Tue, 30 Sep 2025 16:02:44 +0200
Subject: [PATCH] haskellPackages.vaultenv: run hpack in prePatch

This matches cabal2nix generated expressions. We assume that the cabal
file exists after the user supplied prePatch.
---
 pkgs/development/tools/haskell/vaultenv/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/tools/haskell/vaultenv/default.nix b/pkgs/development/tools/haskell/vaultenv/default.nix
index ee9d867c128d..ad645ef016ec 100644
--- a/pkgs/development/tools/haskell/vaultenv/default.nix
+++ b/pkgs/development/tools/haskell/vaultenv/default.nix
@@ -46,6 +46,7 @@ mkDerivation rec {
   prePatch = ''
     substituteInPlace package.yaml \
         --replace -Werror ""
+    hpack
   '';
 
   isLibrary = false;
@@ -82,7 +83,6 @@ mkDerivation rec {
     hspec-expectations
     quickcheck-instances
   ];
-  preConfigure = "hpack";
   homepage = "https://github.com/channable/vaultenv#readme";
   description = "Runs processes with secrets from HashiCorp Vault";
   license = lib.licenses.bsd3;