chore: Nix: fix macOS build

nix/bootstrap.nix

@@ -94,7 +94,7 @@ rec {
       leanshared = runCommand "leanshared" { buildInputs = [ stdenv.cc ]; } ''
         mkdir $out
         LEAN_CC=${stdenv.cc}/bin/cc ${lean-bin-tools-unwrapped}/bin/leanc -shared ${lib.optionalString stdenv.isLinux "-Bsymbolic"} \
-          ${if stdenv.isDarwin then "${lib.concatMapStringsSep " " (l: "-Wl,-force_load,${l.staticLib}/*") stdlib} -Wl,-force_load,${leancpp}/lib/lean/libleancpp.a ${leancpp}/lib/libleanrt_initial-exec.a -lc++"
+          ${if stdenv.isDarwin then "-Wl,-force_load,${Init.staticLib}/libInit.a -Wl,-force_load,${Std.staticLib}/libStd.a -Wl,-force_load,${Lean.staticLib}/libLean.a -Wl,-force_load,${leancpp}/lib/lean/libleancpp.a ${leancpp}/lib/libleanrt_initial-exec.a -lc++"
             else "-Wl,--whole-archive -lInit -lStd -lLean -lleancpp ${leancpp}/lib/libleanrt_initial-exec.a -Wl,--no-whole-archive -lstdc++"} -lm ${stdlibLinkFlags} \
           -o $out/libleanshared${stdenv.hostPlatform.extensions.sharedLibrary}
       '';