diff --git a/README.md b/README.md
index 346754c4..7639530a 100644
--- a/README.md
+++ b/README.md
@@ -611,6 +611,8 @@ global:
                      You can make reference to any OS environment variable using ${VARIABLE}.
                      The KIPRJMOD is also available for expansion.
       * Valid keys:
+        - `define_old`: [boolean=false] Also define legacy versions of the variables.
+                        Useful when using KiCad 6 and some libs uses old KiCad 5 names.
         - `footprints`: [string=''] System level footprints (aka modules) dir. KiCad 5: KICAD_FOOTPRINT_DIR and KISYSMOD.
                         KiCad 6: KICAD6_FOOTPRINT_DIR.
         - `models_3d`: [string=''] System level 3D models dir. KiCad 5: KISYS3DMOD. KiCad 6: KICAD6_3DMODEL_DIR.
diff --git a/docs/Makefile b/docs/Makefile
index 4cf7f4de..60af4182 100755
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -10,7 +10,7 @@ all: ../README.md  samples/generic_plot.kibot.yaml ../kibot/report_templates/rep
 ../kibot/config_templates/bom/%.kibot.yaml: samples/%.kibot.yaml
 	cp $< $@
 
-../README.md: README.in replace_tags.pl ../kibot/out_*.py ../kibot/pre_*.py ../kibot/fil_*.py ../kibot/__main__.py ../kibot/config_reader.py
+../README.md: README.in replace_tags.pl ../kibot/out_*.py ../kibot/pre_*.py ../kibot/fil_*.py ../kibot/__main__.py ../kibot/config_reader.py ../kibot/globals.py
 	cat README.in | perl replace_tags.pl > ../README.md
 
 ../src/kibot-check: ../src/kibot-check.in replace_tags.pl ../kibot/out_*.py ../kibot/pre_*.py ../kibot/registrable.py ../kibot/misc.py ../kibot/config_reader.py
diff --git a/kibot/globals.py b/kibot/globals.py
index 74b1e7d6..cefbd661 100644
--- a/kibot/globals.py
+++ b/kibot/globals.py
@@ -34,35 +34,46 @@ class Environment(Optionable):
             """ User level templates dir. KiCad 5/6: KICAD_USER_TEMPLATE_DIR """
             self.third_party = ''
             """ 3rd party dir. KiCad 6: KICAD6_3RD_PARTY """
+            self.define_old = False
+            """ Also define legacy versions of the variables.
+                Useful when using KiCad 6 and some libs uses old KiCad 5 names """
+
+    def define_k5_vars(self, defs):
+        if self.symbols:
+            defs['KICAD_SYMBOL_DIR'] = self.symbols
+        if self.footprints:
+            defs['KICAD_FOOTPRINT_DIR'] = self.symbols
+            defs['KISYSMOD'] = self.symbols
+        if self.models_3d:
+            defs['KISYS3DMOD'] = self.models_3d
+        if self.templates:
+            defs['KICAD_TEMPLATE_DIR'] = self.templates
+        if self.user_templates:
+            defs['KICAD_USER_TEMPLATE_DIR'] = self.user_templates
+
+    def define_k6_vars(self, defs):
+        if self.symbols:
+            defs['KICAD6_SYMBOL_DIR'] = self.symbols
+        if self.footprints:
+            defs['KICAD6_FOOTPRINT_DIR'] = self.symbols
+        if self.models_3d:
+            defs['KICAD6_3DMODEL_DIR'] = self.models_3d
+        if self.templates:
+            defs['KICAD6_TEMPLATE_DIR'] = self.templates
+        if self.user_templates:
+            defs['KICAD_USER_TEMPLATE_DIR'] = self.user_templates
+        if self.third_party:
+            defs['KICAD6_3RD_PARTY'] = self.third_party
 
     def config(self, parent):
         super().config(parent)
         defs = {}
         if GS.ki5():
-            if self.symbols:
-                defs['KICAD_SYMBOL_DIR'] = self.symbols
-            if self.footprints:
-                defs['KICAD_FOOTPRINT_DIR'] = self.symbols
-                defs['KISYSMOD'] = self.symbols
-            if self.models_3d:
-                defs['KISYS3DMOD'] = self.models_3d
-            if self.templates:
-                defs['KICAD_TEMPLATE_DIR'] = self.templates
-            if self.user_templates:
-                defs['KICAD_USER_TEMPLATE_DIR'] = self.user_templates
+            self.define_k5_vars(defs)
         else:
-            if self.symbols:
-                defs['KICAD6_SYMBOL_DIR'] = self.symbols
-            if self.footprints:
-                defs['KICAD6_FOOTPRINT_DIR'] = self.symbols
-            if self.models_3d:
-                defs['KICAD6_3DMODEL_DIR'] = self.models_3d
-            if self.templates:
-                defs['KICAD6_TEMPLATE_DIR'] = self.templates
-            if self.user_templates:
-                defs['KICAD_USER_TEMPLATE_DIR'] = self.user_templates
-            if self.third_party:
-                defs['KICAD6_3RD_PARTY'] = self.third_party
+            self.define_k6_vars(defs)
+            if self.define_old:
+                self.define_k5_vars(defs)
         if len(defs):
             logger.debug('Defining environment vars from the global section')
             env = {}