diff --git a/doc/manual/expressions/advanced-attributes.xml b/doc/manual/expressions/advanced-attributes.xml
index 83ad6eefc..f3cf98371 100644
--- a/doc/manual/expressions/advanced-attributes.xml
+++ b/doc/manual/expressions/advanced-attributes.xml
@@ -139,7 +139,7 @@ impureEnvVars = [ "http_proxy" "https_proxy" <replaceable>...</replaceable> ];
 <programlisting>
 fetchurl {
   url = http://ftp.gnu.org/pub/gnu/hello/hello-2.1.1.tar.gz;
-  md5 = "70c9ccf9fac07f762c24f2df2290784d";
+  sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
 }
 </programlisting>
 
@@ -150,7 +150,7 @@ fetchurl {
 <programlisting>
 fetchurl {
   url = ftp://ftp.nluug.nl/pub/gnu/hello/hello-2.1.1.tar.gz;
-  md5 = "70c9ccf9fac07f762c24f2df2290784d";
+  sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
 }
 </programlisting>
 
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index 125cbd782..229a73fb1 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -973,8 +973,8 @@ stdenv.mkDerivation {
   ";
 
   src = fetchurl {
-    url = http://nix.cs.uu.nl/dist/tarballs/hello-2.1.1.tar.gz;
-    md5 = "70c9ccf9fac07f762c24f2df2290784d";
+    url = http://ftp.nluug.nl/pub/gnu/hello/hello-2.1.1.tar.gz;
+    sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
   };
   inherit perl;
 }</programlisting>
diff --git a/doc/manual/expressions/expression-syntax.xml b/doc/manual/expressions/expression-syntax.xml
index 6f1a3a10c..b674b0d60 100644
--- a/doc/manual/expressions/expression-syntax.xml
+++ b/doc/manual/expressions/expression-syntax.xml
@@ -16,7 +16,7 @@ stdenv.mkDerivation { <co xml:id='ex-hello-nix-co-2' />
   builder = ./builder.sh; <co xml:id='ex-hello-nix-co-4' />
   src = fetchurl { <co xml:id='ex-hello-nix-co-5' />
     url = ftp://ftp.nluug.nl/pub/gnu/hello/hello-2.1.1.tar.gz;
-    md5 = "70c9ccf9fac07f762c24f2df2290784d";
+    sha256 = "1md7jsfd8pa45z73bz1kszpp01yw6x5ljkjk2hx7wl800any6465";
   };
   inherit perl; <co xml:id='ex-hello-nix-co-6' />
 }</programlisting>