--- a/flavor.in
+++ b/flavor.in
@@ -88,14 +88,8 @@
 for d in %{buildroot}%{#FLAVOR#_sitelib} %{buildroot}%{#FLAVOR#_sitearch}; do \
   if [ -d $d ]; then \
     find $d -iname '*.pyc' -delete \
-    find $d -iname '*.py' -print0 | xargs -0 %__#FLAVOR# -c ' \
-import sys, py_compile \
-for f in sys.argv[1:]: \
-  fp=f[len("%{buildroot}"):] \
-  print(f"Generating cached byte-code for {fp}") \
-  for o in [0, 1]: \
-    py_compile.compile(f, dfile=fp, optimize=o) \
-' \
+    find $d -iname '*.py' -printf 'Generating cached byte-code for %%P\\n' -exec %__#FLAVOR# -c \\\
+       'import py_compile; f="{}"; [py_compile.compile(f, dfile=f[len("%{buildroot}"):], optimize=o) for o in [0, 1]]' ';' \
   fi \
 done