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-rw-r--r--pkgs/applications/graphics/paraview/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/graphics/paraview/default.nix b/pkgs/applications/graphics/paraview/default.nix
index 1a47a355749..ddf7c537062 100644
--- a/pkgs/applications/graphics/paraview/default.nix
+++ b/pkgs/applications/graphics/paraview/default.nix
@@ -30,7 +30,7 @@ mkDerivation rec {
   # libraries.  These reside in build/lib, and are not found by
   # default.
   preBuild = ''
-    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$PWD/lib:$PWD/VTK/ThirdParty/vtkm/vtk-m/lib
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}$PWD/lib:$PWD/VTK/ThirdParty/vtkm/vtk-m/lib
   '';
 
   enableParallelBuilding = true;