diff --git a/README.md b/README.md
index 7095fae..299c16f 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 
 8-bit emulator experiments in Zig.
 
+> NOTE: no longer works with Zig 0.13.0, instead use the Zig nightly version
+
 ## Usage
 
 ### Arcade Machines:
diff --git a/emus/build.zig b/emus/build.zig
index b189145..0e60bb3 100644
--- a/emus/build.zig
+++ b/emus/build.zig
@@ -75,20 +75,25 @@ const EmuOptions = struct {
 };
 
 fn addEmulator(b: *Build, opts: EmuOptions) void {
-    const exe = b.addExecutable(.{
-        .name = opts.name,
+    const mod = b.createModule(.{
         .root_source_file = b.path(opts.src),
         .target = opts.target,
         .optimize = opts.optimize,
+        .imports = &.{
+            .{ .name = "chipz", .module = opts.mod_chipz },
+            .{ .name = "host", .module = opts.mod_host },
+            .{ .name = "sokol", .module = opts.mod_sokol },
+        },
     });
     if (opts.model != .NONE) {
         const options = b.addOptions();
         options.addOption(Model, "model", opts.model);
-        exe.root_module.addOptions("build_options", options);
+        mod.addOptions("build_options", options);
     }
-    exe.root_module.addImport("chipz", opts.mod_chipz);
-    exe.root_module.addImport("host", opts.mod_host);
-    exe.root_module.addImport("sokol", opts.mod_sokol);
+    const exe = b.addExecutable(.{
+        .name = opts.name,
+        .root_module = mod,
+    });
     b.installArtifact(exe);
 
     const run_cmd = b.addRunArtifact(exe);
diff --git a/tests/build.zig b/tests/build.zig
index 09ef6ab..692717b 100644
--- a/tests/build.zig
+++ b/tests/build.zig
@@ -22,11 +22,15 @@ pub fn build(b: *Build, opts: Options) void {
     inline for (tests) |name| {
         const exe = b.addExecutable(.{
             .name = name,
-            .root_source_file = b.path(b.fmt("{s}/{s}.zig", .{ opts.src_dir, name })),
-            .target = opts.target,
-            .optimize = opts.optimize,
+            .root_module = b.createModule(.{
+                .root_source_file = b.path(b.fmt("{s}/{s}.zig", .{ opts.src_dir, name })),
+                .target = opts.target,
+                .optimize = opts.optimize,
+                .imports = &.{
+                    .{ .name = "chipz", .module = opts.mod_chipz },
+                },
+            }),
         });
-        exe.root_module.addImport("chipz", opts.mod_chipz);
         b.installArtifact(exe);
 
         const run = b.addRunArtifact(exe);
@@ -46,11 +50,15 @@ pub fn build(b: *Build, opts: Options) void {
     inline for (unit_tests) |name| {
         const unit_test = b.addTest(.{
             .name = name ++ ".test",
-            .root_source_file = b.path(b.fmt("{s}/{s}.test.zig", .{ opts.src_dir, name })),
-            .target = opts.target,
+            .root_module = b.createModule(.{
+                .root_source_file = b.path(b.fmt("{s}/{s}.test.zig", .{ opts.src_dir, name })),
+                .target = opts.target,
+                .imports = &.{
+                    .{ .name = "chipz", .module = opts.mod_chipz },
+                },
+            }),
         });
         b.installArtifact(unit_test); // install an exe for debugging
-        unit_test.root_module.addImport("chipz", opts.mod_chipz);
         const run_unit_test = b.addRunArtifact(unit_test);
         test_step.dependOn(&run_unit_test.step);
     }
diff --git a/tools/build.zig b/tools/build.zig
index 49526b7..801d44d 100644
--- a/tools/build.zig
+++ b/tools/build.zig
@@ -31,9 +31,11 @@ const ToolOptions = struct {
 fn buildTool(b: *Build, options: ToolOptions) void {
     const exe = b.addExecutable(.{
         .name = options.name,
-        .root_source_file = b.path(options.src),
-        .target = options.target,
-        .optimize = options.optimize,
+        .root_module = b.createModule(.{
+            .root_source_file = b.path(options.src),
+            .target = options.target,
+            .optimize = options.optimize,
+        }),
     });
     b.installArtifact(exe);