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-rw-r--r--pkgs/applications/science/math/sage/sage-env.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/science/math/sage/sage-env.nix b/pkgs/applications/science/math/sage/sage-env.nix
index 00397239876b..68e0d134ace2 100644
--- a/pkgs/applications/science/math/sage/sage-env.nix
+++ b/pkgs/applications/science/math/sage/sage-env.nix
@@ -177,7 +177,7 @@ writeTextFile rec {
     export SAGE_EXTCODE='${sagelib.src}/src/ext'
 
   # for find_library
-    export DYLD_LIBRARY_PATH="${lib.makeLibraryPath [stdenv.cc.libc singular]}:$DYLD_LIBRARY_PATH"
+    export DYLD_LIBRARY_PATH="${lib.makeLibraryPath [stdenv.cc.libc singular]}''${DYLD_LIBRARY_PATH:+:}$DYLD_LIBRARY_PATH"
   '';
 } // {
   lib = sagelib; # equivalent of `passthru`, which `writeTextFile` doesn't support