https://github.com/ziglang/zig/issues/7550

./deps/zig-wlroots/src/backend/session.zig:8:12: error: container 'std.os' has no member called 'dev_t'
    dev: os.dev_t,
           ^
./deps/zig-wlroots/src/xwayland.zig:40:21: error: container 'std.os' has no member called 'time_t'
    server_start: os.time_t,
                    ^
./deps/zig-wlroots/src/xwayland.zig:70:5: note: while checking this field
    server: *XwaylandServer,
    ^
./river/Server.zig:56:1: note: while checking this field
xwayland: if (build_options.xwayland) *wlr.Xwayland else void,
^
./river/main.zig:116:26: note: referenced here
    var server: Server = undefined;
                         ^

--- deps/zig-wlroots/src/backend/session.zig.orig	2020-12-24 11:19:51 UTC
+++ deps/zig-wlroots/src/backend/session.zig
@@ -5,7 +5,7 @@ const wl = wayland.server.wl;
 
 pub const Device = extern struct {
     fd: c_int,
-    dev: os.dev_t,
+    dev: u64,
     signal: wl.Signal(*Session),
 
     /// Session.devices
--- deps/zig-wlroots/src/xwayland.zig.orig	2020-12-24 11:19:51 UTC
+++ deps/zig-wlroots/src/xwayland.zig
@@ -37,7 +37,7 @@ pub const XwaylandServer = extern struct {
     wm_fd: [2]c_int,
     wl_fd: [2]c_int,
 
-    server_start: os.time_t,
+    server_start: i64,
     display: c_int,
     display_name: [16]u8,
     x_fd: [2]c_int,