Index: en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
+++ en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
@@ -7581,14 +7581,11 @@
 
 	<programlisting>OPTIONS_DEFINE=	OPT1
 
-post-patch:
-	@${REINPLACE_CMD} -e 's/echo/true/' ${WRKSRC}/Makefile
-
 post-patch-OPT1-on:
-	@${REINPLACE_CMD} -e '/opt1/d' ${WRKSRC}/Makefile
+	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${EXAMPLESDIR}/|' ${WRKSRC}/Makefile
 
 post-patch-OPT1-off:
-	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${LOCALBASE}/bin/|' ${WRKSRC}/Makefile</programlisting>
+	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${PREFIX}/bin/|' ${WRKSRC}/Makefile</programlisting>
 
 	<para>is equivalent to:</para>
 
@@ -7597,11 +7594,10 @@
 .include &lt;bsd.port.options.mk&gt;
 
 post-patch:
-	@${REINPLACE_CMD} -e 's/echo/true/' ${WRKSRC}/Makefile
 .if ${PORT_OPTIONS:MOPT1}
-	@${REINPLACE_CMD} -e '/opt1/d' ${WRKSRC}/Makefile
+	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${EXAMPLESDIR}/|' ${WRKSRC}/Makefile
 .else
-	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${LOCALBASE}/bin/|' ${WRKSRC}/Makefile
+	@${REINPLACE_CMD} -e '/opt1/s|/usr/bin/|${PREFIX}/bin/|' ${WRKSRC}/Makefile
 .endif</programlisting>
       </sect3>
     </sect2>
Index: en_US.ISO8859-1/books/porters-handbook/slow-porting/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/porters-handbook/slow-porting/chapter.xml
+++ en_US.ISO8859-1/books/porters-handbook/slow-porting/chapter.xml
@@ -415,7 +415,13 @@
 	variable:</para>
 
       <programlisting>post-patch:
-	@${REINPLACE_CMD} -e 's|for Linux|for FreeBSD|g' ${WRKSRC}/README</programlisting>
+	@${REINPLACE_CMD} -e 's|/usr/local|${PREFIX}|g' ${WRKSRC}/Makefile</programlisting>
+
+      <important>
+	<para>Only use &man.sed.1; to replace variable content.  Do
+	  not use it to replace static content, use patch files for
+	  that.</para>
+      </important>
 
       <para>Quite often, software being ported uses the CR/LF
 	convention in source files.  This may cause problems with