diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd1ee69..bfb02fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,9 @@
     full path of the modulefile and the user name.
   * modulecmd is now relocatable using the environment variable
     `PMODULES_HOME`
-  * experimental support for modulecmd written in Tcl has been removed.
+  * experimental support for modulecmd written in Tcl removed.
+  * The environment variable `PMODULES_TMPDIR` and `PMODILES_DISTFILESDIR`
+    can now be used to override the values set in the configuration file.
   
 ## Version 1.0.0rc13
 * same as 1.0.0rc12 but compiled on SL6
diff --git a/Pmodules/modbuild.in b/Pmodules/modbuild.in
index c202e03..f374ba5 100755
--- a/Pmodules/modbuild.in
+++ b/Pmodules/modbuild.in
@@ -24,20 +24,18 @@ else
 fi
 PATH+='/usr/bin:/bin:/usr/sbin:/sbin'
 PATH+=":${mydir}"
-PATH+=":${mydir}/../lib:${mydir}/../config"
+PATH+=":${mydir}/../lib"
+
+# path of config files
+PATH+=":${mydir}/../config"
 
 source libstd.bash    || {
         echo "Oops: cannot source library -- '$_'" 1>&2; exit 3;
 }
-
-# can be set in the configuration file
-declare         PMODULES_DISTFILESDIR=''
-declare         PMODULES_TMPDIR=''
-
 source libpbuild.bash    || \
         std::die 3 "Oops: cannot source library -- '$_'"
 
-# save arguments, (still) required for building dependencies
+# save arguments, required for building dependencies
 declare -r ARGS="$@"
 
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