diff --git a/.gitignore b/.gitignore
index 686f558c..844400cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,11 @@ etc/*.yaml
 etc/*.secret
 public/
 conftools/
+thirdparty/build.log
+thirdparty/cache
+thirdparty/carton/
+thirdparty/latest-build
+thirdparty/touch
+thirdparty/lib/
+thirdparty/work/
+thirdparty/bin/
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 00000000..92d82d03
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+perl system
diff --git a/Makefile.am b/Makefile.am
index 32c4ba57..60e117d3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,33 +1,17 @@
-#  Copyright (C) 2020 Fritz Zaucker
+#  Copyright (C) 2023 Fritz Zaucker
 
-AUTOMAKE_OPTIONS = foreign
+AUTOMAKE_OPTIONS =  foreign
 
-SUBDIRS = etc frontend
 
-PUB := $(shell find -L public -type d \( -name ".??*" -o -name transpiled \) -prune -o -not -name "*db.json" -a -not -name "*.map" -a -not -name "*~" -a -not -name transpiled -a -not -name "*.tmp"  -a -type f -print )
-SHARE := $(shell test -d share && find -L share -type d -name ".??*" -prune -o -not -name ".*" -a -not -name "*~" -a -not -name "*.tmp" -a -not -name '*.sql' -a -not -wholename '*/Docu/*' -a -not -wholename '*/Docu' -a -not -wholename '*/_Attic' -a -not -wholename '*/_Attic/*' -a -type f -print)
-
-PERLTESTS := $(shell find -L t -name "*.t")
-PM := $(shell find -L lib -name "*.pm")
-
-#EXTRA_DIST = META6.json COPYRIGHT LICENSE CHANGES AUTHORS bootstrap $(PUB) $(POD) $(TEMPL) $(SHARE)
-
-EXTRA_DIST = META6.json COPYRIGHT bin lib/Agrammon bootstrap $(PUB) $(SHARE) # $(PERLTESTS)
+SUBDIRS = thirdparty etc frontend
 
-YEAR := $(shell date +%Y)
-DATE := $(shell date +%Y-%m-%d)
-
-datadir = $(prefix)
-nobase_data_DATA = $(PUB) $(TEMPL) $(SHARE)
-
-README.md COPYRIGHT:
-	$(PERL) -i -p -e 's/(#VERSION#|\d+\.\d+\.\d+[^.\s]*)/$(PACKAGE_VERSION)/g;s/(#YEAR#|20[1-9]\d)/$(YEAR)/g;s/(#DATE#|20[1-9]\d-[01]\d-[0-3]\d)/$(DATE)/g;' $@
+PUB := $(shell find -L public -type d \( -name ".??*" -o -name transpiled \) -prune -o -not -name "*db.json" -a -not -name "*.map" -a -not -name "*~" -a -not -name transpiled -a -not -name "*.tmp"  -a -type f -print )
 
+TEMPL := $(shell test -d templates && find -L templates -type f -name "*.ep")
+SHARE := $(shell test -d share && find -L share -type d -name ".??*" -prune -o -not -name ".*" -a -not -name "*~" -a -not -name "*.tmp"  -a -type f -print)
 
-LANGUAGES := $(shell  $(PERL) -e 'use JSON::PP qw(decode_json); print join(" ", map {"share/".$$_.".po"} @{decode_json(join("",<>))->{locales}})' frontend/compile.json)
+PERLTESTS := $(shell find t -name "*.t")
+PM := $(shell find lib -name "*.pm")
 
-test:
-	prove -j8 -e 'raku -Ilib' t
+EXTRA_DIST = VERSION cpanfile COPYRIGHT LICENSE CHANGES AUTHORS bootstrap $(PUB) $(wildcard t/*.t) $(POD) $(TEMPL) $(PERLTESTS) $(SHARE) Dockerfile
 
-unit-test:
-	AGRAMMON_UNIT_TEST=1 prove -j8 -e 'raku -Ilib' t
diff --git a/VERSION b/VERSION
index 798e3899..19b860c1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.3.0
+6.4.0
diff --git a/configure.ac b/configure.ac
index 36df524a..b64433df 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,6 +154,7 @@ AC_CONFIG_FILES([
     Makefile
     etc/Makefile
     frontend/Makefile
+    thirdparty/Makefile
 ])
 
 AC_SUBST(VERSION)
diff --git a/cpanfile b/cpanfile
new file mode 100644
index 00000000..ce89cddd
--- /dev/null
+++ b/cpanfile
@@ -0,0 +1 @@
+requires 'Excel::Writer::XLSX';
diff --git a/dev/META6.json b/dev/META6.json
index 3742bdae..18977cc6 100644
--- a/dev/META6.json
+++ b/dev/META6.json
@@ -21,6 +21,7 @@
     "DB::Pg",
     "Digest::SHA1::Native",
     "Email::MIME",
+    "Inline::Perl5",
     "IO::Path::ChildSecure",
     "IO::String",
     "LibXML:ver<0.7.9+>",
@@ -29,6 +30,7 @@
     "OO::Monitors",
     "Shell::Command",
     "Spreadsheet::XLSX:ver<0.2.4+>",
+    "Temp::Path",
     "Text::CSV",
     "YAMLish",
     "Cro::APIToken",
diff --git a/lib/Agrammon/OutputFormatter/ExcelFast.pm6 b/lib/Agrammon/OutputFormatter/ExcelFast.pm6
index 8bfb5569..ccfa01d7 100644
--- a/lib/Agrammon/OutputFormatter/ExcelFast.pm6
+++ b/lib/Agrammon/OutputFormatter/ExcelFast.pm6
@@ -8,6 +8,7 @@ use Agrammon::Web::SessionUser;
 #use Spreadsheet::XLSX;
 #use Spreadsheet::XLSX::Styles;
 
+use Temp::Path;
 use Excel::Writer::XLSX:from<Perl5>;
 
 sub input-output-as-excel(
@@ -19,9 +20,8 @@ sub input-output-as-excel(
     Bool $include-filters, Bool $all-filters
 ) is export {
 
-    my $temp-filename = "$dataset-name.xlsx";
-
-    my $workbook = Excel::Writer::XLSX.new($temp-filename);
+    my $temp-file = make-temp-path :suffix<.xlsx>;
+    my $workbook = Excel::Writer::XLSX.new($temp-file.absolute);
     
     # prepare sheets
     my $output-sheet = $workbook.add_worksheet('Ergebnisse');
@@ -162,5 +162,5 @@ sub input-output-as-excel(
         $row-formatted++;
     }
     $workbook.close();
-    return $temp-filename.IO.slurp: :bin;
+    return $temp-file.slurp: :bin;
 }
diff --git a/lib/Agrammon/UI/CommandLine.rakumod b/lib/Agrammon/UI/CommandLine.rakumod
index 7c6fb96d..4bbeccc7 100644
--- a/lib/Agrammon/UI/CommandLine.rakumod
+++ b/lib/Agrammon/UI/CommandLine.rakumod
@@ -59,7 +59,7 @@ multi sub MAIN('web', Str $model-filename, ExistingFile :$cfg-file, Str :$techni
 multi sub MAIN('run', Str $filename, ExistingFileOrStdin $input, ExistingFile :$cfg-file, Str :$technical-file,
         SupportedLanguage :$language = 'de', Str :$print-only,  Int :$report-selected, Str :$variants = 'Base',
         Bool :$include-filters, Bool :$include-all-filters=False, Int :$batch=1, Int :$degree=4, Int :$max-runs,
-        OutputFormat :$format = 'text', Str :$export-filename='test.xlsx'
+        OutputFormat :$format = 'text', Str :$export-filename='test'
     ) is export {
     my @print-set = $print-only.split(',') if $print-only;
     my $data = run $filename, $input.IO, $technical-file, $variants, $format, $language, @print-set,
@@ -98,8 +98,8 @@ multi sub MAIN('run', Str $filename, ExistingFileOrStdin $input, ExistingFile :$
                 }
                 for %sim-results.keys.sort -> $dataset {
                     if $format eq 'excel' {
-                        spurt "$export-filename.xlsx", %sim-results{$dataset};
-                        return;
+                        $export-filename //= $dataset;
+                        spurt "$export-filename-$dataset.xlsx", %sim-results{$dataset};
                     }
                     else {
                         @output.push("#   Dataset $dataset");
diff --git a/lib/Agrammon/Web/Routes.rakumod b/lib/Agrammon/Web/Routes.rakumod
index d91b589c..0b2887fa 100644
--- a/lib/Agrammon/Web/Routes.rakumod
+++ b/lib/Agrammon/Web/Routes.rakumod
@@ -357,7 +357,9 @@ sub frontend-api-routes (Str $schema, $ws) {
             request-body -> %params {
                 # prevent header injection
                 my $filename = cleanup-filename "%params<datasetName>.xlsx";
-                my $excel = $ws.get-excel-export($user, %params).to-blob;
+                # use with Excel.pm
+                # my $excel = $ws.get-excel-export($user, %params).to-blob;
+                my $excel = $ws.get-excel-export($user, %params);
                 header 'Content-disposition', qq{attachment; filename="$filename"};
                 content 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', $excel;
                 CATCH {
diff --git a/share/Models/version6/Livestock/DairyCow/Excretion.nhd b/share/Models/version6/Livestock/DairyCow/Excretion.nhd
index fe5b4352..e31bd628 100644
--- a/share/Models/version6/Livestock/DairyCow/Excretion.nhd
+++ b/share/Models/version6/Livestock/DairyCow/Excretion.nhd
@@ -172,6 +172,7 @@ Richner, W., Flisch, R., Mayer, J., Schlegel, P., Zähner, M., Menzi, H., 2017.
 ?endif
 
 ### just for testing hidden inputs
+?if TESTING
 +hiddenAnimals
   type = float
   hidden = true
@@ -185,6 +186,7 @@ Richner, W., Flisch, R., Mayer, J., Schlegel, P., Zähner, M., Menzi, H., 2017.
     en = -
   ++description
     Just for testing.
+?endif
 
 *** technical ***
 
diff --git a/thirdparty/Makefile.am b/thirdparty/Makefile.am
new file mode 100644
index 00000000..6efed1e6
--- /dev/null
+++ b/thirdparty/Makefile.am
@@ -0,0 +1,54 @@
+#  Copyright (C) 2023 Fritz Zaucker
+
+AUTOMAKE_OPTIONS =  foreign
+
+THIRDPARTY_DIR := $(shell pwd)
+
+CPANSNAPV := cpanfile-$(shell $(PERL) -MConfig -e 'my $$v = $$Config{version}; $$v =~ s/\.\d+$$//; print $$v').snapshot
+
+
+#EXTRA_DIST = $(THIRDPARTY_DIST) $(wildcard bin/cpanm)
+EXTRA_DIST = bin/cpanm $(wildcard cpanfile*snapshot)
+
+all-local: touch
+
+touch:  bin/cpanm $(CPANSNAPV)
+	$(AM_V_at)echo "** Installing Dependencies using $(CPANSNAPV)"
+	cp $(CPANSNAPV) ../cpanfile.snapshot
+	test -x carton/bin/carton || PERL_CPANM_OPT= PERL_CPANM_HOME=$(THIRDPARTY_DIR) $(PERL) bin/cpanm -q --notest --local-lib-contained $(THIRDPARTY_DIR)/carton Carton Date::Parse
+# if ever DBD::ODBC is compiled, make sure we get the utf8 version
+	PERL_CPANM_OPT= PERL_CPANM_HOME=$(THIRDPARTY_DIR) DBD_ODBC_UNICODE=1 PERL5LIB=$(THIRDPARTY_DIR)/carton/lib/perl5 PERL_CARTON_PATH=$(THIRDPARTY_DIR) $(PERL) $(THIRDPARTY_DIR)/carton/bin/carton install
+	$(AM_V_at)rm -f ../cpanfile.snapshot
+	$(AM_V_at)touch touch
+
+bin/cpanm:
+	$(AM_V_at)mkdir -p bin
+	$(URL_CAT) https://cpanmin.us > bin/cpanm
+	$(AM_V_at)chmod 755 bin/cpanm
+
+$(CPANSNAPV): ../cpanfile
+	$(AM_V_at)echo "** Installing Dependencies using Carton install"
+	test -f $(CPANSNAPV) && cp $(CPANSNAPV) ../cpanfile.snapshot || true
+	test -x carton/bin/carton || PERL_CPANM_OPT= PERL_CPANM_HOME=$(THIRDPARTY_DIR) $(PERL) bin/cpanm -q --notest --local-lib-contained $(THIRDPARTY_DIR)/carton Carton Date::Parse
+# if ever DBD::ODBC is compiled, make sure we get the utf8 version
+	PERL_CPANM_OPT= PERL_CPANM_HOME=$(THIRDPARTY_DIR) DBD_ODBC_UNICODE=1 PERL5LIB=$(THIRDPARTY_DIR)/carton/lib/perl5 PERL_CARTON_PATH=$(THIRDPARTY_DIR) $(PERL) $(THIRDPARTY_DIR)/carton/bin/carton install
+	mv ../cpanfile.snapshot $(CPANSNAPV)
+	$(AM_V_at)touch touch
+
+update: $(CPANSNAPV)
+	$(AM_V_at)echo "** Updating Dependencies using Carton update"
+	$(AM_V_at)cp $(CPANSNAPV) ../cpanfile.snapshot
+	$(AM_V_at)PERL_CPANM_OPT= PERL_CPANM_HOME=$(THIRDPARTY_DIR) PERL5LIB=$(THIRDPARTY_DIR)/carton/lib/perl5 PERL_CARTON_PATH=$(THIRDPARTY_DIR) $(PERL) $(THIRDPARTY_DIR)/carton/bin/carton update
+	$(AM_V_at)mv ../cpanfile.snapshot $(CPANSNAPV)
+
+clean-local:
+	ls -1 | grep -v Makefile | grep -v cpanfile |grep -v bin | xargs rm -rf
+
+distclean-local:
+	ls -1 | grep -v Makefile | grep -v cpanfile | xargs rm -rf
+
+install-exec-hook:
+	cp -fr lib/perl5/* $(DESTDIR)$(libdir)
+	cp -f bin/cover $(DESTDIR)$(bindir)
+	$(AM_V_at)echo "** Patching cover command"
+	$(PERL) -i -p -e 's{use warnings;}{use warnings;\nuse lib qw($(libdir));}' $(DESTDIR)$(bindir)/cover