diff --git a/build.zig b/build.zig
index 00497eb26c73b293776e0078c227d66bbf5222b9..c45b0864f94487138e189ecc8eb8633e3a5a69e8 100644
--- a/build.zig
+++ b/build.zig
@@ -15,7 +15,7 @@ pub fn build(b: *std.Build) void {
         }),
     });
     deps.addAllTo(test_exe);
-    test_exe.linkLibC();
+    test_exe.root_module.link_libc = true;
     test_exe.use_llvm = !disable_llvm;
     test_exe.use_lld = !disable_llvm;
     b.getInstallStep().dependOn(&test_exe.step);
@@ -59,7 +59,7 @@ fn addFuzzer(b: *std.Build, target: std.Build.ResolvedTarget, comptime name: []c
             .optimize = .Debug,
         }),
     });
-    fuzz_lib.want_lto = true;
+    fuzz_lib.lto = .full;
     fuzz_lib.bundle_compiler_rt = true;
     fuzz_lib.use_llvm = true;
     fuzz_lib.use_lld = true;
diff --git a/fuzz/main.zig b/fuzz/main.zig
index cff0280651585a5cde7d5943389265ec5beeee64..a27fc83092c9102b7755a42b67be7c5746f57e5c 100644
--- a/fuzz/main.zig
+++ b/fuzz/main.zig
@@ -3,7 +3,7 @@ const json = @import("json");
 const nfs = @import("nfs");
 
 pub export fn main() void {
-    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    var gpa = std.heap.DebugAllocator(.{}){};
     defer std.debug.assert(gpa.deinit() == .ok);
     const allocator = gpa.allocator();