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-rw-r--r--pkgs/development/libraries/exiv2/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/exiv2/default.nix b/pkgs/development/libraries/exiv2/default.nix
index 21f63e07335d..425346df816e 100644
--- a/pkgs/development/libraries/exiv2/default.nix
+++ b/pkgs/development/libraries/exiv2/default.nix
@@ -69,7 +69,7 @@ stdenv.mkDerivation rec {
     ''}
 
     ${stdenv.lib.optionalString stdenv.isDarwin ''
-      export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:`pwd`/lib
+      export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}`pwd`/lib
       # Removing tests depending on charset conversion
       substituteInPlace ../test/Makefile --replace "conversions.sh" ""
       rm -f ../tests/bugfixes/redmine/test_issue_460.py