--- a/debian-apt.rst	Sat Feb 19 13:55:37 2011 +0200
+++ b/debian-apt.rst	Sat Feb 19 13:56:37 2011 +0200
@@ -55,5 +55,9 @@
 
 If all you want is checking what packages are needed to build a given package:
 
-  $ apt-cache showsrc package
+  $ apt-cache showsrc $package
 
+or check 'Build-Depends' attribute in
+
+  $ apt-cache show $package
+