diff --git a/perf/meson.build b/perf/meson.build
index c3b0e3e..e12744c 100644
--- a/perf/meson.build
+++ b/perf/meson.build
@@ -6,12 +6,6 @@
   ttf_parser_dep = subproject('ttf-parser').get_variable('ttf_parser_dep')
 endif
 
-if ttf_parser_dep.found()
-  benchmark_cpp_args = ['-DHAVE_TTFPARSER']
-else
-  benchmark_cpp_args = []
-endif
-
 benchmark('perf', executable('perf', 'perf.cc',
   dependencies: [
     google_benchmark_dep, freetype_dep,
@@ -20,8 +14,8 @@
     # https://github.com/RazrFalcon/ttf-parser/issues/29
     ttf_parser_dep, thread_dep, cpp.find_library('dl'),
   ],
-  cpp_args: benchmark_cpp_args,
+  cpp_args: ttf_parser_dep.found() ? ['-DHAVE_TTFPARSER'] : [],
   include_directories: [incconfig, incsrc],
   link_with: [libharfbuzz],
   install: false,
-), workdir: join_paths(meson.current_source_dir(), '..'), timeout: 100)
+), workdir: meson.current_source_dir() / '..', timeout: 100)