diff -ru nix-2.0.4-orig/doc/manual/local.mk nix-2.0.4/doc/manual/local.mk
--- nix-2.0.4-orig/doc/manual/local.mk	2018-07-20 11:12:18.121540267 +0200
+++ nix-2.0.4/doc/manual/local.mk	2018-07-20 11:43:58.514090409 +0200
@@ -1,7 +1,7 @@
 
 ifeq ($(doc_generate),yes)
 
-XSLTPROC = $(xsltproc) --nonet $(xmlflags) \
+XSLTPROC = $(xsltproc) $(xmlflags) \
   --param section.autolabel 1 \
   --param section.label.includes.component.label 1 \
   --param html.stylesheet \'style.css\' \
@@ -21,7 +21,7 @@
 
 # Do XInclude processing / RelaxNG validation
 $(d)/manual.xmli: $(d)/manual.xml $(MANUAL_SRCS) $(d)/version.txt
-	$(trace-gen) $(xmllint) --nonet --xinclude $< -o $@.tmp
+	$(trace-gen) $(xmllint) --xinclude $< -o $@.tmp
 	@mv $@.tmp $@
 
 $(d)/version.txt:
@@ -29,9 +29,6 @@
 
 # Note: RelaxNG validation requires xmllint >= 2.7.4.
 $(d)/manual.is-valid: $(d)/manual.xmli
-	$(trace-gen) $(XSLTPROC) --novalid --stringparam profile.condition manual \
-	  $(docbookxsl)/profiling/profile.xsl $< 2> /dev/null | \
-	  $(xmllint) --nonet --noout --relaxng $(docbookrng) -
 	@touch $@
 
 clean-files += $(d)/manual.xmli $(d)/version.txt $(d)/manual.is-valid