diff --git a/build.zig b/build.zig
index 52d843655e45cb80f3d591e0639825a05d0fec86..1e59d84658b370ad64a9b6db381ce4f137ea0155 100644
--- a/build.zig
+++ b/build.zig
@@ -719,6 +719,21 @@ pub fn build(b: *std.Build) !void {
     check_mingw_run.addDirectoryArg(b.path("lib/libc/mingw"));
     check_mingw_step.dependOn(&check_mingw_run.step);
 
+    {
+        const gpo_step = b.step("gen-parser-oracle", "Regenerate lib/std/zig/parser_generated_oracle.zig from doc/langref/grammar.peg");
+        const gpo_exe = b.addExecutable(.{
+            .name = "gen_parser_oracle",
+            .root_module = b.createModule(.{
+                .root_source_file = b.path("tools/gen_parser_oracle.zig"),
+                .target = b.graph.host,
+            }),
+        });
+        const gpo_run = b.addRunArtifact(gpo_exe);
+        gpo_run.addFileArg(b.path("doc/langref/grammar.peg"));
+        gpo_run.addFileArg(b.path("lib/std/zig/parser_generated_oracle.zig"));
+        gpo_step.dependOn(&gpo_run.step);
+    }
+
     const test_incremental_step = b.step("test-incremental", "Run the incremental compilation test cases");
     try tests.addIncrementalTests(b, test_incremental_step, test_filters);
     if (!skip_test_incremental) test_step.dependOn(test_incremental_step);
diff --git a/lib/std/zig/parser_generated_oracle.zig b/lib/std/zig/parser_generated_oracle.zig
index 0579dd91adcf7d3f66fa20e528e20aca6c6a62cb..2b24677c96cc33db44ea3871c7255e79fd9b5b82 100644
--- a/lib/std/zig/parser_generated_oracle.zig
+++ b/lib/std/zig/parser_generated_oracle.zig
@@ -1,5 +1,5 @@
 //! This file is generated, do not edit manually! To generate, run:
-//! zig run ./tools/gen_parser_oracle.zig -- ./doc/langref/grammar.peg > ./lib/std/zig/parser_generated_oracle.zig
+//! zig build gen-parser-oracle
 
 const std = @import("std");
 
diff --git a/tools/gen_parser_oracle.zig b/tools/gen_parser_oracle.zig
index 26e550fef1adcde2e8eb01356dd5fdef63b84c2e..a5bad1238ec74748d654e92b962ef7fa360da609 100644
--- a/tools/gen_parser_oracle.zig
+++ b/tools/gen_parser_oracle.zig
@@ -1,5 +1,5 @@
 //! Example usage:
-//! zig run ./tools/gen_parser_oracle.zig -- ./doc/langref/grammar.peg > ./lib/std/zig/parser_generated_oracle.zig
+//! zig build gen-parser-oracle
 
 // This program implements a subset of the PEG grammar definition
 // in the peg(1) man page.
@@ -21,6 +21,7 @@ pub fn main(init: std.process.Init) !void {
     const args = try init.minimal.args.toSlice(arena);
 
     const grammar_path = args[1];
+    const out_path = args[2];
 
     const grammar = try Io.Dir.cwd().readFileAlloc(io, grammar_path, gpa, .unlimited);
     defer gpa.free(grammar);
@@ -52,12 +53,13 @@ pub fn main(init: std.process.Init) !void {
         return error.ParseError;
     }
 
-    var stdout_buffer: [4096]u8 = undefined;
-    var stdout_writer = Io.File.stdout().writerStreaming(io, &stdout_buffer);
-    const stdout = &stdout_writer.interface;
+    var out_file = try Io.Dir.cwd().createFile(io, out_path, .{});
+    var out_buffer: [4096]u8 = undefined;
+    var out_writer = out_file.writer(io, &out_buffer);
+    const out = &out_writer.interface;
 
-    try tree.render(gpa, stdout, .{});
-    try stdout.flush();
+    try tree.render(gpa, out, .{});
+    try out.flush();
 }
 
 const Generator = struct {
@@ -78,7 +80,7 @@ const Generator = struct {
     fn genRoot(g: *Generator, node: Node.Index) Error!void {
         try g.w.writeAll(
             \\//! This file is generated, do not edit manually! To generate, run:
-            \\//! zig run ./tools/gen_parser_oracle.zig -- ./doc/langref/grammar.peg > ./lib/std/zig/parser_generated_oracle.zig
+            \\//! zig build gen-parser-oracle
             \\
             \\const std = @import("std");
             \\