Index: head/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
+++ head/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
@@ -948,6 +948,16 @@
 	    </row>
 
 	    <row>
+	      <entry><varname>CARGO_INSTALL_PATH</varname></entry>
+	      <entry><literal>.</literal></entry>
+	      <entry>Path to the crate to install.  This is passed
+		to <command>cargo install</command> via its
+		<literal>--path</literal> argument.  When multiple
+		paths are specified <command>cargo install</command>
+		is run multiple times.</entry>
+	    </row>
+
+	    <row>
 	      <entry><varname>CARGO_TEST</varname></entry>
 	      <entry><literal>yes</literal></entry>
 	      <entry>Use the default