Fixed nix shell for local build

default.nix

@@ -150,11 +150,6 @@ let
       #pkgsCross.windows.pthreads
     ];
 
-    buildInputs = [
-      pkgsCross.stdenv.cc
-      pkgsCross.windows.pthreads
-    ];
-
     SODIUM_LIB_DIR = "${libsodium}/lib";
 
     # Required because ring crate is special. This also seems to have
@@ -164,10 +159,7 @@ let
     CARGO_BUILD_TARGET = rustTarget;
     CARGO_BUILD_RUSTFLAGS = [
       "-C" "target-feature=+crt-static"
-
-      # -latomic is required to build openssl-sys for armv6l-linux, but
-      # it doesn't seem to hurt any other builds.
-      "-C" "link-args=-static -latomic"
+      "-C" "link-args=-static"
 
       # https://github.com/rust-lang/cargo/issues/4133
       "-C" "linker=${TARGET_CC}"
@@ -190,7 +182,7 @@ in {
     ];
   } // buildEnv);
 
-  shell = pkgsCross.mkShell buildEnv;
+  shell = pkgs.mkShell buildEnv;
 
   # TODO
   #clippy = {