diff --git a/chapter05/binutils-pass1.xml b/chapter05/binutils-pass1.xml
index 1ddea43ed..f3b651fc5 100644
--- a/chapter05/binutils-pass1.xml
+++ b/chapter05/binutils-pass1.xml
@@ -150,7 +150,7 @@ cd       build</userinput></screen>
           for a dynamic linker to perform symbol lookup.  On LFS the dynamic
           linker (provided by the Glibc package) will always use the
           GNU-style hash table which is faster to query.  So the classic
-          ELF hash table is completely useless.  This makes the the linker
+          ELF hash table is completely useless.  This makes the linker
           only generate the GNU-style hash table by default, so we can avoid
           wasting time to generate the classic ELF hash table when we build
           the packages, or wasting disk space to store it.</para>
diff --git a/chapter08/udev.xml b/chapter08/udev.xml
index e2016042c..570f304e7 100644
--- a/chapter08/udev.xml
+++ b/chapter08/udev.xml
@@ -126,9 +126,10 @@ meson setup \
     </variablelist>
 
     <para>Get the list of the shipped udev helpers and save it into an
-    environment variable:</para>
+    environment variable (exporting it is not strictly necessary, but it makes
+    building as a regular user or using a package manager easier):</para>
 
-    <screen><userinput remap="make">udev_helpers=$(grep "'name' :" ../src/udev/meson.build | \
+    <screen><userinput remap="make">export udev_helpers=$(grep "'name' :" ../src/udev/meson.build | \
                awk '{print $3}' | tr -d ",'" | grep -v 'udevadm')</userinput></screen>
 
     <para>Only build the components needed for udev:</para>
@@ -186,6 +187,12 @@ sed 's|lib.*udevd|sbin/udevd|'                                        \
 
 rm /usr/share/man/man*/systemd*</userinput></screen>
 
+    <para>Finally, unset the <envar>udev_helpers</envar> variable:</para>
+
+    <!-- remap="make" seems confusing but we don't have sth. like
+         remap="clean".  -->
+    <screen><userinput remap="make">unset udev_helpers</userinput></screen>
+
   </sect2>
 
   <!-- - - - - - - - - - -->