[fix]

build/compilation.zig

@@ -3,15 +3,16 @@ const std = @import ("std");
 pub fn addHeader (lib: *std.Build.Step.Compile, source: [] const u8,
   dest: [] const u8, ext: [] const [] const u8) void
 {
+  const builder = lib.step.owner;
   std.debug.print ("[{s} header] {s}\n", .{ lib.name, source, });
-  lib.installHeadersDirectory (.{ .cwd_relative = source, }, dest,
+  lib.installHeadersDirectory (builder.path (source), dest,
     .{ .include_extensions = ext, });
 }
 
 pub fn addInclude (lib: *std.Build.Step.Compile, path: [] const u8) void
 {
   const builder = lib.step.owner;
-  const lazy = std.Build.LazyPath { .cwd_relative = builder.dupe (path), };
+  const lazy = builder.path (builder.dupe (path));
   std.debug.print ("[{s} include] {s}\n",
     .{ lib.name, lazy.getPath (builder), });
   lib.addIncludePath (lazy);
@@ -25,8 +26,8 @@ pub fn addSource (lib: *std.Build.Step.Compile, root_path: [] const u8,
     &.{ root_path, base_path, });
   std.debug.print ("[{s} source] {s}\n", .{ lib.name, source_path, });
   lib.addCSourceFile (.{
-    .file = .{ .cwd_relative = try std.fs.path.relative (builder.allocator,
-      builder.build_root.path.?, source_path), },
+    .file = builder.path (try std.fs.path.relative (builder.allocator,
+      builder.build_root.path.?, source_path)),
     .flags = flags,
   });
 }