diff --git a/doc/manual/advanced-topics/post-build-hook.xml b/doc/manual/advanced-topics/post-build-hook.xml
index 4335b308..3dc43ee7 100644
--- a/doc/manual/advanced-topics/post-build-hook.xml
+++ b/doc/manual/advanced-topics/post-build-hook.xml
@@ -74,6 +74,8 @@ trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDS
 #!/bin/sh
 
 set -eu
+set -f # disable globbing
+export IFS=' '
 
 echo "Signing paths" $OUT_PATHS
 nix sign-paths --key-file /etc/nix/key.private $OUT_PATHS
@@ -88,8 +90,9 @@ exec nix copy --to 's3://example-nix-cache' $OUT_PATHS
       list of Nix store paths. In this case, we expect and want the
       shell to perform word splitting to make each output path its
       own argument to <command>nix sign-paths</command>. Nix guarantees
-      the paths will only contain characters which are safe for word
-      splitting, and free of any globs.
+      the paths will not contain any spaces, however a store path
+      might contain glob characters. The <command>set -f</command>
+      disables globbing in the shell.
     </para>
   </note>
   <para>
diff --git a/doc/manual/command-ref/conf-file.xml b/doc/manual/command-ref/conf-file.xml
index d2c9c750..e818a74c 100644
--- a/doc/manual/command-ref/conf-file.xml
+++ b/doc/manual/command-ref/conf-file.xml
@@ -674,6 +674,7 @@ password <replaceable>my-password</replaceable>
         <listitem><para>The hook does not execute on substituted paths.</para></listitem>
         <listitem><para>The hook's output always goes to the user's terminal.</para></listitem>
         <listitem><para>If the hook fails, the build succeeds but no further builds execute.</para></listitem>
+        <listitem><para>The hook executes synchronously, and blocks other builds from progressing while it runs.</para>
       </itemizedlist>
 
       <para>The program executes with no arguments. The program's environment
@@ -693,7 +694,7 @@ password <replaceable>my-password</replaceable>
         <varlistentry>
           <term><envar>OUT_PATHS</envar></term>
           <listitem>
-            <para>Output paths of the built derivation, separated by a space (<literal> </literal>) character.</para>
+            <para>Output paths of the built derivation, separated by a space character.</para>
             <para>Example:
             <literal>/nix/store/zf5lbh336mnzf1nlswdn11g4n2m8zh3g-bash-4.4-p23-dev
             /nix/store/rjxwxwv1fpn9wa2x5ssk5phzwlcv4mna-bash-4.4-p23-doc