setenv LILYINCLUDE "@datadir@/ly:@datadir@/afm"
# include an empty path component for the system wide includes.
-setenv MFINPUTS "@datadir@/mf:"${MFINPUTS:=":"}
-setenv TEXINPUTS "@datadir@/tex:"${TEXINPUTS:=":"}
+setenv MFINPUTS "@datadir@/mf:$MFINPUTS::"
+setenv TEXINPUTS "@datadir@/tex:$TEXINPUTS::"
setenv GUILE_LOAD_PATH "@datadir@/scm:$GUILE_LOAD_PATH"