t.Run(c.name, func(t *testing.T) {
			srcDir := t.TempDir()
			for filename, contents := range c.srcFiles {
				file.WriteOrFail(t, filepath.Join(srcDir, filename), []byte(contents))
			}

			targetDir := t.TempDir()
			for filename, contents := range c.existingFiles {
				file.WriteOrFail(t, filepath.Join(targetDir, filename), []byte(contents))
			}

			binariesCopied, err := copyBinaries(srcDir, []string{targetDir})