From 97a6b079e779449d2f39267db037c10e32a8def9 Mon Sep 17 00:00:00 2001
From: Hamish Mackenzie <Hamish.K.Mackenzie@gmail.com>
Date: Thu, 29 May 2025 19:34:15 +1200
Subject: [PATCH] Avoid broken symlinks in haddock derivations

Needed for https://github.com/cardano-scaling/hydra/pull/2033
---
 builder/haddock-builder.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/builder/haddock-builder.nix b/builder/haddock-builder.nix
index 97ffdbb607..24f56cbf04 100644
--- a/builder/haddock-builder.nix
+++ b/builder/haddock-builder.nix
@@ -151,8 +151,12 @@ let
           ${ghc.targetPrefix}ghc-pkg -v0 --package-db $configFiles/${configFiles.packageCfgDir} -f $out/package.conf.d register "$pkg"
         done
 
-        ln -s ${componentDrv}/exactDep $out/exactDep
-        ln -s ${componentDrv}/envDep $out/envDep
+        if [ -d ${componentDrv}/exactDep ]; then
+          ln -s ${componentDrv}/exactDep $out/exactDep
+        fi
+        if [ -f ${componentDrv}/envDep ]; then
+          ln -s ${componentDrv}/envDep $out/envDep
+        fi
       '';
   }
   // haskellLib.optionalHooks {