diff --git a/README.md b/README.md
index c2bffef..69c0143 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ ZigWindowsTilingWindowManager: Tiling window manager for windows, inspired by dw
 1. Clone the repository using `git clone --recurse-submodules https://github.com/Nimaoth/zwtwm.git`
 2. Install zig.  I developed using zig version `0.8.0-dev.1140+9270aae07`, might not build with other versions.
 3. For a release build (logs to file instead of console, ReleaseFast configuration), run `zig build --prefix dist -Drelease`
-4. For a debug build (logs to the console, Debug configuration), run `zig build --prefix dist`
+4. For a debug build (logs to the console, Debug configuration), run `zig build --prefix dist -Dconsole`
 5. Use files in `<zwtwm-repository>/dist/bin`
 
 ## Configuration
diff --git a/build.zig b/build.zig
index 0ee469f..df2fb0d 100644
--- a/build.zig
+++ b/build.zig
@@ -1,5 +1,20 @@
 const std = @import("std");
 
+const Guid = std.os.windows.GUID;
+
+pub extern "RPCRT4" fn UuidCreate(
+    Uuid: *Guid,
+) callconv(std.os.windows.WINAPI) i32;
+
+pub extern "RPCRT4" fn UuidToStringA(
+    Uuid: *Guid,
+    StringUuid: *[*:0]u8,
+) callconv(@import("std").os.windows.WINAPI) i32;
+
+pub extern "RPCRT4" fn RpcStringFreeA(
+    String: *[*:0]u8,
+) callconv(@import("std").os.windows.WINAPI) i32;
+
 pub fn build(b: *std.build.Builder) void {
     // Standard target options allows the person running `zig build` to choose
     // what target to build for. Here we do not override the defaults, which
@@ -9,23 +24,30 @@ pub fn build(b: *std.build.Builder) void {
 
     // Standard release options allow the person running `zig build` to select
     // between Debug, ReleaseSafe
-    const release = b.option(bool, "release", "Optimizations on and safety on, log to file") orelse false;
+    const release = b.option(bool, "release", "Optimizations on and safety on.") orelse false;
+    const console = b.option(bool, "console", "Log to the console.") orelse false;
+    std.log.info("Building with release={}, console={}", .{ release, console });
 
     var mode = if (release) std.builtin.Mode.ReleaseSafe else std.builtin.Mode.Debug;
-    mode = .Debug;
     b.is_release = mode != .Debug;
     b.release_mode = mode;
 
+    // Generate guid
+    var guid: Guid = undefined;
+    _ = UuidCreate(&guid);
+    var guidStringPtr: [*:0]u8 = undefined;
+    _ = UuidToStringA(&guid, &guidStringPtr);
+    const guidString = guidStringPtr[0..std.mem.len(guidStringPtr)];
+    std.log.info("Using tray icon guid: {s}", .{guidString});
+    defer _ = RpcStringFreeA(&guidStringPtr);
+
     const exe = b.addExecutable(if (release) "zwtwm" else "zwtwm_debug", "src/main.zig");
-    exe.addBuildOption(bool, "RUN_IN_CONSOLE", !release);
-    if (release) {
-        exe.addBuildOption([]const u8, "TRAY_GUID", "99b74174-d3a4-48ba-a886-9af100149755");
-    } else {
-        exe.addBuildOption([]const u8, "TRAY_GUID", "b3e926bb-e7ee-4f2a-b513-0080167ec220");
-    }
-    exe.subsystem = if (release) .Windows else .Console;
+    exe.addBuildOption(bool, "RUN_IN_CONSOLE", console);
+    exe.addBuildOption([]const u8, "TRAY_GUID", guidString);
     exe.addPackage(.{ .name = "zigwin32", .path = "./deps/custom_zigwin32/win32.zig" });
 
+    exe.subsystem = if (!console) .Windows else .Console;
+    std.log.info("Using subsystem {}", .{exe.subsystem});
     exe.setTarget(target);
     exe.setBuildMode(mode);
     exe.install();