diff --git a/Makefile.am b/Makefile.am
index 64ee234..1cb40b3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,6 +20,12 @@ banner:
 # 'nothing to be done for test'. By forwarding test to check we work around it.
 test: check
 
+# recurse all make devs just
+dev:
+	$(MAKE) dev -C tools/tokenisers
+	$(MAKE) dev -C tools/grammarcheckers
+	$(MAKE) dev -C tools/tts
+
 # Remove html tables created by some of the developer tools:
 clean-local:
 	rm -f *.html
diff --git a/m4/giella-macros.m4 b/m4/giella-macros.m4
index 7b41780..4cec2db 100644
--- a/m4/giella-macros.m4
+++ b/m4/giella-macros.m4
@@ -88,7 +88,7 @@ AC_MSG_RESULT([$GIELLA_CORE])
 ###############################################################
 ### This is the version of the Giella Core that we require. ###
 ### UPDATE AS NEEDED.
-_giella_core_min_version=0.22.2
+_giella_core_min_version=0.23.0
 
 # GIELLA_CORE/GTCORE env. variable, required by the infrastructure to find scripts:
 AC_ARG_VAR([GIELLA_CORE], [directory for the Giella infra core scripts and other required resources])
@@ -162,21 +162,7 @@ AS_IF([test "x$enable_yamltests" = "xcheck"],
 
 AM_CONDITIONAL([CAN_YAML_TEST], [test "x$enable_yamltests" != xno])
 
-################ LXML or pip ################
-AS_IF([test "x$enable_grammarchecker" != "xno"],
-     [AM_PATH_PYTHON([3.5],, [:])
-     AX_PYTHON_MODULE(lxml)
-     AX_PYTHON_MODULE(pip)
-     AC_MSG_CHECKING([whether we can use lxml])
-     AS_IF([test "x$HAVE_PYMOD_LXML" != "xyes"],
-           AS_IF([test "x$HAVE_PYMOD_PIP" != "xno"],
-                 AC_MSG_RESULT(no)
-                 AC_MSG_WARN([lxml or pip is needed for grammarcheckers]),
-                 AC_MSG_RESULT([no but using pip])),
-           AC_MSG_RESULT(yes))])
-
-AM_CONDITIONAL([CAN_LXML], [test "x$HAVE_PYMOD_LXML" != xno])
-AM_CONDITIONAL([CAN_PIP], [test "x$HAVE_PYMOD_LXML" != xno])
+
 ################ Generated documentation ################
 # Check for awk with required feature:
 AC_CACHE_CHECK([for awk that supports gensub], [ac_cv_path_GAWK],
@@ -676,6 +662,18 @@ AS_IF([test "x$enable_grammarchecker" = "xyes" -a "x$gt_prog_vislcg3" = "xno"],
 AS_IF([test "x$enable_ci" = "xyes" -a "x$enableval" = "x"], [enable_grammarchecker=no])
 AM_CONDITIONAL([WANT_GRAMCHECK], [test "x$enable_grammarchecker" != xno])
 enableval=''
+################ gtgramtool for grammarchecking ################
+AC_PATH_PROG([GTGRAMTOOL], [gtgramtool], [false])
+AS_IF([test "x$enable_grammarchecker" != "xno"],
+    AX_PYTHON_MODULE(pip)
+    AC_MSG_CHECKING([whether we have gtgramtool])
+    AS_IF([test x$GTGRAMTOOL = xfalse], 
+    [AC_MSG_ERROR([gtgramtool is needed for --enable grammarchecker.
+        on debian/ubuntu: sudo apt update; sudo apt install pipx; pipx ensurepath
+        on macbrew: brew install pipx; pipx ensurepath
+        then: pipx install git+https://github.com/divvun/giellaltgramtools
+      ])]),
+    AC_MSG_RESULT(yes))
 
 # Enable all spellers - default is 'no'
 AC_ARG_ENABLE([spellers],
@@ -1048,7 +1046,6 @@ cd ..
 git clone git@github.com:giellalt/$gt_SHARED_FAILS
 cd $gt_SHARED_FAILS
 ./autogen.sh && ./configure && make])])
-AC_MSG_WARN([January 2024: the lexc files and fsts have been moved up to src/fst/morphology])
 ]) # gt_PRINT_FOOTER
 
 # vim: set ft=config:
diff --git a/test/tools/spellcheckers/fstbased/desktop/hfst/accept-all-lemmas.sh.in b/test/tools/spellcheckers/fstbased/desktop/hfst/accept-all-lemmas.sh.in
index eceb38a..40e857f 100755
--- a/test/tools/spellcheckers/fstbased/desktop/hfst/accept-all-lemmas.sh.in
+++ b/test/tools/spellcheckers/fstbased/desktop/hfst/accept-all-lemmas.sh.in
@@ -32,6 +32,10 @@ checked_lemmas=checked_lemmas.txt
     --exclude "(CmpN/Only|ShCmp|\+Cmp\/SplitR| Rreal | R | Rnoun |\+V\+|NOT-TO-LEMMATEST)" \
     $source_files > $lemmas
 
+if ! test -f $speller_dir/${GIELLA_LANG}.zhfst ; then
+    echo missing $speller_dir/${GIELLA_LANG}.zhfst
+fi
+
 ####### Start testing: #######
 
 $ospell $speller_dir/${GIELLA_LANG}.zhfst < $lemmas > $checked_lemmas
@@ -39,6 +43,8 @@ $ospell $speller_dir/${GIELLA_LANG}.zhfst < $lemmas > $checked_lemmas
 grep 'is NOT in the lexicon' $checked_lemmas > $rejected_lemmas
 
 if [ -s $rejected_lemmas ] ; then
+    head $rejected_lemmas
+    echo see $rejected_lemmas for more
     exit 1
 fi