diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4349d7d992..690e2e35b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -501,7 +501,6 @@ set(ZIG_STAGE2_SOURCES
     lib/std/zig/Server.zig
     lib/std/zig/WindowsSdk.zig
     lib/std/zig/Zir.zig
-    lib/std/zig/c_builtins.zig
     lib/std/zig/string_literal.zig
     lib/std/zig/system.zig
     lib/std/zig/system/NativePaths.zig