diff -r 34267fb0912e -r 0c450efc5e3f configure
--- a/configure	Wed Oct 29 22:27:30 2008 +0000
+++ b/configure	Sun Nov 16 21:55:46 2008 +0000
@@ -277,6 +277,16 @@
 [ -z "${DOCDIR_set}" ] && DOCDIR="${PREFIX}/share/doc/ct-ng-${VERSION}"
 [ -z "${MANDIR_set}" ] && MANDIR="${PREFIX}/share/man/man1"
 
+# Check that install PATHs are absolute
+for p in BIN LIB DOC MAN; do
+  var="${p}DIR"
+  eval v="\${${var}}"
+  case "${v}" in
+    /*) ;;
+    *)  do_error "'${var}' is not an absolute path: '${v}'"
+  esac
+done
+
 # Check the existence of absolutely required tools
 { IFS='
 ';