diff --git a/nfs.zig b/nfs.zig
index f720dc5a3b66f2e9b37f11c47dcb66e9593c0a68..3c18dff389718e9075dd57bc2c0ee77881533e67 100644
--- a/nfs.zig
+++ b/nfs.zig
@@ -7,27 +7,32 @@ pub const File = @import("./File.zig");
 
 const os = builtin.target.os.tag;
 
+const sys = switch (os) {
+    .linux => sys_linux,
+    else => unreachable,
+};
+
 pub const Handle = switch (os) {
     .linux => enum(c_int) { _ },
-    else => @compileError("TODO"),
+    else => unreachable,
 };
 
 pub fn cwd() Dir {
-    if (os == .linux)
-        return .{ .fd = @enumFromInt(sys_linux.AT.FDCWD) };
+    return .{ .fd = @enumFromInt(sys.AT.FDCWD) };
 }
 
 pub fn stdin() File {
-    if (os == .linux)
-        return .{ .fd = @enumFromInt(0) };
+    return .{ .fd = @enumFromInt(0) };
 }
 
 pub fn stdout() File {
-    if (os == .linux)
-        return .{ .fd = @enumFromInt(1) };
+    return .{ .fd = @enumFromInt(1) };
 }
 
 pub fn stderr() File {
-    if (os == .linux)
-        return .{ .fd = @enumFromInt(2) };
+    return .{ .fd = @enumFromInt(2) };
+}
+
+pub fn memfd_create(name: [*:0]const u8, flags: c_uint) !File {
+    return .{ .fd = @enumFromInt(try sys.memfd_create(name, flags)) };
 }