diff --git a/src/ChangeLog b/src/ChangeLog
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2010-06-07    <guravage@caterpie.sen.cwi.nl>
+
+	* VirtualLeaf.pro: Removed explicit perl invocation to regerenerate parameter files.
+	* libplugin.pro: ditto.
+
 2010-06-03    <guravage@caterpie.sen.cwi.nl>
 
 	* pardialog.h: Added default versions of this automatically generated file.
diff --git a/src/Makefile b/src/Makefile
--- a/src/Makefile
+++ b/src/Makefile
@@ -23,5 +23,7 @@ clean:
 	make -f Makefile.libplugin clean
 	make -f Makefile.VirtualLeaf clean
 	make -C build_models clean
+	touch VirtualLeaf.pro
+	touch libplugin.pro
 
 #finis
diff --git a/src/VirtualLeaf.pro b/src/VirtualLeaf.pro
--- a/src/VirtualLeaf.pro
+++ b/src/VirtualLeaf.pro
@@ -50,11 +50,6 @@ QT += qt3support
 }
 
 win32 {
- system(WHERE /Q perl && IF errorlevel 0 (DEL parameter.cpp parameter.h pardialog.cpp pardialog.h)
- system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_parameter_source.pl $$PARTMPL)
- system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_pardialog_source.pl $$PARTMPL)
-#system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_xmlwritecode.pl -h $$REACTIONS)
-
  CONFIG += console
  LIBXML2DIR = C:\libxml2
  LIBICONVDIR = C:\libiconv
@@ -98,10 +93,6 @@ macx:release {
 }
 
 unix {
- system(if `which perl > /dev/null 2>&1` ; then rm -f parameter.cpp parameter.h pardialog.cpp pardialog.h; fi)
- system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_parameter_source.pl $$PARTMPL; fi)
- system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_pardialog_source.pl $$PARTMPL; fi)
-#system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_xmlwritecode.pl -h $$REACTIONS; fi)
  CC = /usr/bin/gcc 
  QWTDIR = /ufs/guravage/opt/qwt-5.2.1-svn
  QMAKE_LIBDIR += $$QWTDIR/lib 
diff --git a/src/build_models/Makefile b/src/build_models/Makefile
--- a/src/build_models/Makefile
+++ b/src/build_models/Makefile
@@ -33,5 +33,9 @@ clean:
 	make -f Makefile.plugin_leaf clean
 	make -f Makefile.plugin_meinhardt clean
 	make -f Makefile.plugin_test clean
+	touch plugin_auxingrowth.pro
+	touch plugin_leaf.pro
+	touch plugin_meinhardt.pro
+	touch plugin_test.pro
 
 #finis
diff --git a/src/libplugin.pro b/src/libplugin.pro
--- a/src/libplugin.pro
+++ b/src/libplugin.pro
@@ -63,22 +63,12 @@ SOURCES = \
  warning.cpp
 
 unix {
- system(if `which perl > /dev/null 2>&1` ; then rm -f parameter.cpp parameter.h pardialog.cpp pardialog.h; fi)
- system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_parameter_source.pl $$PARTMPL; fi)
- system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_pardialog_source.pl $$PARTMPL; fi)
-#system(if `which perl > /dev/null 2>&1` ; then perl $$PERLDIR/make_xmlwritecode.pl -h $$REACTIONS; fi)
-
  QMAKE_CXXFLAGS += -fPIC -I/usr/include/libxml2
  QMAKE_LFLAGS += -fPIC
  LIBS += -lxml2 -lz -lm 
 }
 
 win32 {
- system(WHERE /Q perl && IF errorlevel 0 (DEL parameter.cpp parameter.h pardialog.cpp pardialog.h)
- system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_parameter_source.pl $$PARTMPL)
- system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_pardialog_source.pl $$PARTMPL)
-#system(WHERE /Q perl && IF errorlevel 0 (perl $$PERLDIR\make_xmlwritecode.pl -h $$REACTIONS)
-
  LIBXML2DIR = C:\libxml2
  LIBICONVDIR = C:\libiconv
  LIBZDIR = C:\libz