diff --git a/flake.nix b/flake.nix
index 23a5666fca..36afef08e3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -135,7 +135,7 @@
                   for lib in $out/_pkg/*.so; do
                     chmod +w "$lib"
                     ${pkgs.patchelf}/bin/patchelf --remove-needed libunwind.so "$lib"
-                    ${pkgs.patchelf}/bin/patchelf --set-soname $lib $lib
+                    [[ "$lib" != *libsimplex.so ]] ${pkgs.patchelf}/bin/patchelf --set-soname $lib $lib
                   done
 
                   ${pkgs.tree}/bin/tree $out/_pkg