diff --git a/gnu_parallel.spec b/gnu_parallel.spec
index d909256..062d460 100644
--- a/gnu_parallel.spec
+++ b/gnu_parallel.spec
@@ -83,7 +83,7 @@ This subpackage contains the zsh completion for Parallel.
 cp -a CITATION NEWS README "%buildroot/%_docdir/%name/"
 
 # fix shebang to to not use env & preserve the time stamps
-sed -i.orig "s:^#\!%{_bindir}/env\s\+perl\s\?$:#!%__perl:" "%buildroot/%_bindir/parallel"
+sed -i.orig "s:^#\!/usr/bin/env\s\+perl\s\?$:#!perl:" "%buildroot/%_bindir/parallel"
 touch -r "%buildroot/%_bindir/parallel.orig" "%buildroot/%_bindir/parallel"
 rm "%buildroot/%_bindir/parallel.orig"
 
@@ -98,10 +98,10 @@ rm "%buildroot/%_bindir/parallel.orig"
 %_mandir/man7/*.7*
 
 %files bash-completion
-%{_datadir}/bash-completion/completions/parallel
+%_datadir/bash-completion/
 
 %files zsh-completion
-%{_datadir}/zsh/site-functions/_parallel
+%_datadir/zsh/
 
 %files doc
 %_docdir/%name/