diff --git a/build.zig b/build.zig
index c002c9b9e7b402e7281ab501e14b88df0197d127..adc4a30253d0ecda794b15f1b61d1fa9d289fc52 100644
--- a/build.zig
+++ b/build.zig
@@ -3,14 +3,17 @@ const deps = @import("./deps.zig");
 
 pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
-    const mode = b.option(std.builtin.Mode, "mode", "") orelse .Debug;
+    const mode = b.option(std.builtin.OptimizeMode, "mode", "") orelse .Debug;
     const disable_llvm = b.option(bool, "disable_llvm", "use the non-llvm zig codegen") orelse false;
 
-    const lib = b.addStaticLibrary(.{
+    const lib = b.addLibrary(.{
+        .linkage = .static,
         .name = "icu",
-        .root_source_file = b.path("src/main.zig"),
-        .target = target,
-        .optimize = mode,
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/main.zig"),
+            .target = target,
+            .optimize = mode,
+        }),
     });
     deps.addAllTo(lib);
     lib.use_llvm = !disable_llvm;
@@ -24,9 +27,11 @@ pub fn build(b: *std.Build) void {
     // });
 
     const tests = b.addTest(.{
-        .root_source_file = b.path("test.zig"),
-        .target = target,
-        .optimize = mode,
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("test.zig"),
+            .target = target,
+            .optimize = mode,
+        }),
     });
     deps.addAllTo(tests);
     tests.use_llvm = !disable_llvm;