Collapse nixExecToRustExec to musl not gnu

Author: palfrey

local-remote-execution/flake-module.nix

@@ -100,9 +100,9 @@
           in
             {
               "aarch64-darwin" = "aarch64-apple-darwin";
-              "aarch64-linux" = "aarch64-unknown-linux-gnu";
+              "aarch64-linux" = "aarch64-unknown-linux-musl";
               "x86_64-darwin" = "x86_64-apple-darwin";
-              "x86_64-linux" = "x86_64-unknown-linux-gnu";
+              "x86_64-linux" = "x86_64-unknown-linux-musl";
             }.${
               system
             } or (throw "Unsupported Nix exec platform: ${system}");