fix /usr/lib issues

src/build/GhosttyExe.zig

@@ -99,7 +99,7 @@ fn checkNixShell(exe: *std.Build.Step.Compile, cfg: *const Config) !void {
             \\
             \\  nix develop -c zig build
             \\
-            ++
+        ++
             "\x1b[0m",
         .{},
     );

src/build/SharedDeps.zig

@@ -277,7 +277,10 @@ pub fn add(
     // on x86_64.
     if (step.rootModuleTarget().os.tag == .linux) {
         const triple = try step.rootModuleTarget().linuxTriple(b.allocator);
-        step.addLibraryPath(.{ .cwd_relative = b.fmt("/usr/lib/{s}", .{triple}) });
+        const path = b.fmt("/usr/lib/{s}", .{triple});
+        if (std.fs.accessAbsolute(path, .{})) {
+            step.addLibraryPath(.{ .cwd_relative = path });
+        } else |_| {}
     }
 
     // C files

src/os/wasm.zig

@@ -4,7 +4,7 @@ const builtin = @import("builtin");
 const options = @import("build_options");
 
 comptime {
-    if (!builtin.target.isWasm()) {
+    if (!builtin.target.cpu.arch.isWasm()) {
         @compileError("wasm.zig should only be analyzed for wasm32 builds");
     }
 }