Fink build of lilypond fails in 2.7.35 and 2.7.36

[Matthias Neeracher]

I'm getting a somewhat puzzling build error in the last two releases,  
all the more puzzling as I haven't seen anybody else report it:

[...]
gnumake PACKAGE=LILYPOND package=lilypond -C include man && true
/sw/build.build/lilypond-devel-2.7.36-1/lilypond-2.7.36/stepmake/ 
stepmake/generic-targets.make:138: out/dummy.dep: No such file or  
directory
please ignore innocent warning about dummy.dep
mkdir -p ./out
touch ./out/dummy.dep
true
gnumake PACKAGE=LILYPOND package=lilypond -C include all && true
true
/sw/build.build/lilypond-devel-2.7.36-1/lilypond-2.7.36/stepmake/ 
stepmake/generic-targets.make:138: out/dummy.dep: No such file or  
directory
GNUmakefile:73: *** missing separator.  Stop.
gnumake: *** [all] Error 2
### execution of gnumake failed, exit code 2

That build error is in the mf directory, and line 73 is the "endef"  
line of:

define EMMENTALER_RULE
$(outdir)/$(PFA_PREFIX)emmentaler-$(1).pfa $(outdir)/emmentaler- 
$(1).otf $(outdir)/emmentaler-$(1).svg: $(outdir)/emmentaler-$(1).pe $ 
(outdir)/feta$(1).pfa  $(outdir)/feta-alphabet$(1).pfa  $(outdir)/ 
parmesan$(1).pfa
        $(call MAKE_OTF,emmentaler-$(1).pe, $(outdir)/PFAemmentaler-$ 
(1).pfa)
endef

I'm afraid that construct is a bit beyond my understanding of GNU  
make. Any idea of what could be going wrong here? I'm using GNU make  
3.80

Matthias