diff --git a/doc/manual/Makefile.am b/doc/manual/Makefile.am
index 637d370c1..009496a8f 100644
--- a/doc/manual/Makefile.am
+++ b/doc/manual/Makefile.am
@@ -1,5 +1,5 @@
-XMLLINT = $(xmllint) $(xmlflags)
-XSLTPROC = $(xsltproc) $(xmlflags) \
+XMLLINT = $(xmllint) --nonet $(xmlflags)
+XSLTPROC = $(xsltproc) --nonet $(xmlflags) \
  --param section.autolabel 1 \
  --param section.label.includes.component.label 1 \
  --param html.stylesheet \'style.css\' \
@@ -34,24 +34,36 @@ MANUAL_SRCS = manual.xml introduction.xml installation.xml \
  conf-file.xml release-notes.xml \
  style.css images
 
+# Do XInclude processing.
+manual.xmli: $(MANUAL_SRCS) version.txt
+	$(XMLLINT) --xinclude $< -o $@.tmp
+	mv $@.tmp $@
+
 # Note: RelaxNG validation requires xmllint >= 2.7.4.
-manual.is-valid: $(MANUAL_SRCS) version.txt
-	$(XMLLINT) --noout --nonet --xinclude --noxincludenode --relaxng $(docbookrng)/docbook.rng $<
+manual.is-valid: manual.xmli
+	$(XSLTPROC) --novalid --stringparam profile.condition manual \
+	  $(docbookxsl)/profiling/profile.xsl $< 2> /dev/null | \
+	  $(XMLLINT) --noout --relaxng $(docbookrng)/docbook.rng -
 	touch $@
 
 version.txt:
 	echo -n $(VERSION) > version.txt
 
-man $(MANS): $(MANUAL_SRCS) manual.is-valid
-	$(XSLTPROC) --nonet --xinclude $(docbookxsl)/manpages/docbook.xsl manual.xml
+man $(MANS): manual.is-valid
+	$(XSLTPROC) --stringparam profile.condition manpage \
+	  $(docbookxsl)/profiling/profile.xsl manual.xmli 2> /dev/null | \
+	  $(XSLTPROC) $(docbookxsl)/manpages/docbook.xsl -
 
 manual.html: $(MANUAL_SRCS) manual.is-valid images
-	$(XSLTPROC) --nonet --xinclude --output manual.html \
-	  $(docbookxsl)/html/docbook.xsl manual.xml
+	$(XSLTPROC) --xinclude --stringparam profile.condition manual \
+	  $(docbookxsl)/profiling/profile.xsl manual.xml | \
+	  $(XSLTPROC) --output manual.html $(docbookxsl)/html/docbook.xsl -
 
 manual.pdf: $(MANUAL_SRCS) manual.is-valid images
 	if test "$(dblatex)" != ""; then \
-		$(dblatex) $(dblatex_opts) manual.xml; \
+		$(XSLTPROC) --xinclude --stringparam profile.condition manual \
+		  $(docbookxsl)/profiling/profile.xsl manual.xml | \
+		  $(dblatex) -o manual.pdf $(dblatex_opts) -; \
 	else \
 		echo "Please install dblatex and rerun configure."; \
 		exit 1; \
@@ -64,12 +76,12 @@ NEWS_OPTS = \
  --stringparam header.rule 0
 
 NEWS.html: release-notes.xml
-	$(XSLTPROC) --nonet --xinclude --output $@ $(NEWS_OPTS) \
+	$(XSLTPROC) --xinclude --output $@ $(NEWS_OPTS) \
 	  $(docbookxsl)/html/docbook.xsl release-notes.xml
 
 NEWS.txt: release-notes.xml
-	$(XSLTPROC) --nonet --xinclude quote-literals.xsl release-notes.xml | \
-	  $(XSLTPROC) --nonet --output $@.tmp.html $(NEWS_OPTS) \
+	$(XSLTPROC) --xinclude quote-literals.xsl release-notes.xml | \
+	  $(XSLTPROC) --output $@.tmp.html $(NEWS_OPTS) \
 	  $(docbookxsl)/html/docbook.xsl -
 	LANG=en_US $(w3m) -dump $@.tmp.html > $@
 	rm $@.tmp.html
diff --git a/doc/manual/nix-build.xml b/doc/manual/nix-build.xml
index 465635f67..1194f2962 100644
--- a/doc/manual/nix-build.xml
+++ b/doc/manual/nix-build.xml
@@ -75,11 +75,11 @@ or renamed.  So don’t rename the symlink.</para></warning>
 
 <refsection><title>Options</title>
 
-<para>See also <xref linkend="sec-common-options" />.  All options not
-listed here are passed to <command>nix-store --realise</command>,
-except for <option>--arg</option> and <option>--attr</option> /
-<option>-A</option> which are passed to
-<command>nix-instantiate</command>.</para>
+<para>All options not listed here are passed to <command>nix-store
+--realise</command>, except for <option>--arg</option> and
+<option>--attr</option> / <option>-A</option> which are passed to
+<command>nix-instantiate</command>.  <phrase condition="manual">See
+also <xref linkend="sec-common-options" />.</phrase></para>
 
 <variablelist>
 
@@ -122,6 +122,10 @@ except for <option>--arg</option> and <option>--attr</option> /
 
 </variablelist>
 
+<variablelist condition="manpage">
+  <xi:include href="opt-common.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(//db:variablelist[@xml:id='opt-common']/*)" />
+</variablelist>
+
 </refsection>
 
 
diff --git a/doc/manual/nix-env.xml b/doc/manual/nix-env.xml
index a03afaf5c..72c15b022 100644
--- a/doc/manual/nix-env.xml
+++ b/doc/manual/nix-env.xml
@@ -18,7 +18,7 @@
 <refsynopsisdiv>
   <cmdsynopsis>
     <command>nix-env</command>
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(/db:nop/*)" />
+    <xi:include href="opt-common-syn.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(/db:nop/*)" />
     <arg><option>--arg</option> <replaceable>name</replaceable> <replaceable>value</replaceable></arg>
     <arg><option>--argstr</option> <replaceable>name</replaceable> <replaceable>value</replaceable></arg>
     <arg>
@@ -71,8 +71,8 @@ be performed.  These are documented below.</para>
 
 <para>This section lists the options that are common to all
 operations.  These options are allowed for every subcommand, though
-they may not always have an effect.  See also <xref
-linkend="sec-common-options" />.</para>
+they may not always have an effect.  <phrase condition="manual">See
+also <xref linkend="sec-common-options" />.</phrase></para>
 
 <variablelist>
 
@@ -131,6 +131,10 @@ linkend="sec-common-options" />.</para>
 
 </variablelist>
 
+<variablelist condition="manpage">
+  <xi:include href="opt-common.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(//db:variablelist[@xml:id='opt-common']/*)" />
+</variablelist>
+
 </refsection>
 
 
diff --git a/doc/manual/nix-instantiate.xml b/doc/manual/nix-instantiate.xml
index ba89af425..b213535ff 100644
--- a/doc/manual/nix-instantiate.xml
+++ b/doc/manual/nix-instantiate.xml
@@ -64,8 +64,8 @@ store derivation instantiation from Nix expressions automatically).
 It is most commonly used for implementing new deployment
 policies.</para>
 
-<para>See also <xref linkend="sec-common-options" /> for a list of
-common options.</para>
+<para condition="manual">See also <xref linkend="sec-common-options"
+/> for a list of common options.</para>
 
 </refsection>
 
@@ -127,6 +127,10 @@ common options.</para>
 
 </variablelist>
 
+<variablelist condition="manpage">
+  <xi:include href="opt-common.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(//db:variablelist[@xml:id='opt-common']/*)" />
+</variablelist>
+
 </refsection>
 
 
diff --git a/doc/manual/nix-store.xml b/doc/manual/nix-store.xml
index aaacb7cfb..0c235c688 100644
--- a/doc/manual/nix-store.xml
+++ b/doc/manual/nix-store.xml
@@ -48,8 +48,9 @@ be performed.  These are documented below.</para>
 
 <para>This section lists the options that are common to all
 operations.  These options are allowed for every subcommand, though
-they may not always have an effect.  See also <xref
-linkend="sec-common-options" /> for a list of common options.</para>
+they may not always have an effect.  <phrase condition="manual">See
+also <xref linkend="sec-common-options" /> for a list of common
+options.</phrase></para>
 
 <variablelist>
 
@@ -112,6 +113,10 @@ lrwxrwxrwx    1 ... 2005-03-13 21:10 /home/eelco/bla/result -> /nix/store/1r1134
     
 </variablelist>
 
+<variablelist condition="manpage">
+  <xi:include href="opt-common.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(//db:variablelist[@xml:id='opt-common']/*)" />
+</variablelist>
+
 </refsection>
 
   
diff --git a/doc/manual/opt-common.xml b/doc/manual/opt-common.xml
index c36c6df41..92b76c01f 100644
--- a/doc/manual/opt-common.xml
+++ b/doc/manual/opt-common.xml
@@ -5,7 +5,7 @@
 
 <para>Most Nix commands accept the following command-line options:</para>
 
-<variablelist>
+<variablelist xml:id="opt-common">
 
 <varlistentry><term><option>--help</option></term>