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-rw-r--r--pkgs/development/libraries/cutelyst/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/cutelyst/default.nix b/pkgs/development/libraries/cutelyst/default.nix
index 6cd464e55390..2cf611eed275 100644
--- a/pkgs/development/libraries/cutelyst/default.nix
+++ b/pkgs/development/libraries/cutelyst/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   ];
 
   preBuild = ''
-    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:`pwd`/Cutelyst:`pwd`/EventLoopEPoll"
+    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}`pwd`/Cutelyst:`pwd`/EventLoopEPoll"
   '';
 
   postBuild = ''