diff --git a/etc/makeFiles/scotch/Makefile.inc.Darwin.shlib b/etc/makeFiles/scotch/Makefile.inc.Darwin.shlib
index b9e4c5a..58683d3 100644
--- a/etc/makeFiles/scotch/Makefile.inc.Darwin.shlib
+++ b/etc/makeFiles/scotch/Makefile.inc.Darwin.shlib
@@ -60,7 +60,9 @@ MKDIR       = mkdir
 MV          = mv
 RANLIB      = echo
 
-LEX         = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
-YACC        = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+FLEX        = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
+BISON       = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+LEX         = $(FLEX)
+YACC        = $(BISON)
 
 #------------------------------------------------------------------------------
diff --git a/etc/makeFiles/scotch/Makefile.inc.Linux-Mingw.shlib b/etc/makeFiles/scotch/Makefile.inc.Linux-Mingw.shlib
index 7254e21..5808412 100644
--- a/etc/makeFiles/scotch/Makefile.inc.Linux-Mingw.shlib
+++ b/etc/makeFiles/scotch/Makefile.inc.Linux-Mingw.shlib
@@ -76,7 +76,9 @@ MKDIR       = mkdir
 MV          = mv
 RANLIB      = echo
 
-LEX         = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
-YACC        = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+FLEX        = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
+BISON       = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+LEX         = $(FLEX)
+YACC        = $(BISON)
 
 #------------------------------------------------------------------------------
diff --git a/etc/makeFiles/scotch/Makefile.inc.Linux.shlib b/etc/makeFiles/scotch/Makefile.inc.Linux.shlib
index 20d29be..0199027 100644
--- a/etc/makeFiles/scotch/Makefile.inc.Linux.shlib
+++ b/etc/makeFiles/scotch/Makefile.inc.Linux.shlib
@@ -60,7 +60,9 @@ MKDIR       = mkdir
 MV          = mv
 RANLIB      = echo
 
-LEX         = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
-YACC        = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+FLEX        = flex "-Pscotchyy$(SCOTCH_NAME_SUFFIX)" -olex.yy.c
+BISON       = bison "-pscotchyy$(SCOTCH_NAME_SUFFIX)" -y -b y
+LEX         = $(FLEX)
+YACC        = $(BISON)
 
 #------------------------------------------------------------------------------