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-rw-r--r--pkgs/applications/misc/audio/soxr/default.nix4
1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/applications/misc/audio/soxr/default.nix b/pkgs/applications/misc/audio/soxr/default.nix
index 7c4e6ff8c3d..20a754ba98a 100644
--- a/pkgs/applications/misc/audio/soxr/default.nix
+++ b/pkgs/applications/misc/audio/soxr/default.nix
@@ -11,9 +11,9 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "doc" ]; # headers are just two and very small
 
   preConfigure = if stdenv.isDarwin then ''
-    export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:"`pwd`/build/src
+    export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}"`pwd`/build/src
   '' else ''
-    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:"`pwd`/build/src
+    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}"`pwd`/build/src
   '';
 
   nativeBuildInputs = [ cmake ];