diff --git a/lib/compiler/Maker/Step/FindProgram.zig b/lib/compiler/Maker/Step/FindProgram.zig
index d3b8d067388bd1a6ff875b27aa314aa0d764980a..b3396cc5c82f0c0484b3a992753b7a17a6c8ec30 100644
--- a/lib/compiler/Maker/Step/FindProgram.zig
+++ b/lib/compiler/Maker/Step/FindProgram.zig
@@ -93,7 +93,7 @@ fn checkCandidate(
             while (it.next()) |ext| {
                 if (!supportedWindowsProgramExtension(ext)) continue;
 
-                const extended_path = try std.mem.concat(arena, &.{ full_path, ext });
+                const extended_path = try std.mem.concat(arena, u8, &.{ full_path, ext });
 
                 if (Io.Dir.cwd().access(io, extended_path, .{ .execute = true })) |_| {
                     maker.generatedPath(found_path).* = .initCwd(extended_path);
diff --git a/lib/compiler/Maker/Watch.zig b/lib/compiler/Maker/Watch.zig
index 99502df188bb14e651c15ed80deb80d9c6eb3dd8..05dace418b062c5d464758040543705b5c1f80d0 100644
--- a/lib/compiler/Maker/Watch.zig
+++ b/lib/compiler/Maker/Watch.zig
@@ -548,9 +548,11 @@ const Os = switch (builtin.os.tag) {
         }
 
         fn update(w: *Watch, steps: []const Configuration.Step.Index) !void {
-            const gpa = w.maker.gpa;
+            const maker = w.maker;
+            const gpa = maker.gpa;
             // Add missing marks and note persisted ones.
-            for (steps) |step| {
+            for (steps) |step_index| {
+                const step = maker.stepByIndex(step_index);
                 for (step.inputs.table.keys(), step.inputs.table.values()) |path, *files| {
                     const dir = dir: {
                         const gop = try w.dir_table.getOrPut(gpa, path);
@@ -579,7 +581,7 @@ const Os = switch (builtin.os.tag) {
                     for (files.items) |basename| {
                         const gop = try dir.reaction_set.getOrPut(gpa, basename);
                         if (!gop.found_existing) gop.value_ptr.* = .{};
-                        try gop.value_ptr.put(gpa, step, w.generation);
+                        try gop.value_ptr.put(gpa, step_index, w.generation);
                     }
                 }
             }