diff --git a/mercurial.spec b/mercurial.spec
index 2648501..91e5348 100644
--- a/mercurial.spec
+++ b/mercurial.spec
@@ -151,7 +151,7 @@ popd
 %endif
 
 %install
-%{python3} setup.py install -O1 --root %{buildroot} --prefix %{_prefix}
+%py3_install
 make install-doc DESTDIR=%{buildroot} MANDIR=%{_mandir}
 
 # Overrule setup.py policy "c" for module usage: always allow rust extension (if available)
@@ -209,7 +209,7 @@ rm -rf %{buildroot}%{python3_sitearch}/mercurial/locale
 
 %find_lang hg
 
-%{__python3} %{_rpmconfigdir}/redhat/pathfix.py -pni "%{python3}" %{buildroot}%{_bindir}/hg-ssh
+%py3_shebang_fix %{buildroot}%{_bindir}/hg-ssh
 
 
 %files -f hg.lang