anchor.diff:    };
   
     postPhase =
  -  /* Fix include directory */ ''
  -    sed -i Makefile \
  -      -e 's,$(GSM_INSTALL_ROOT)/inc,$(GSM_INSTALL_ROOT)/include/gsm,'
  -  '' + optionalString (!staticSupport)
  -  /* Build ELF shared object */ ''
  -    sed -i Makefile \
  -      -e 's,libgsm.a,libgsm.so,' \
  -      -e 's/$(AR) $(ARFLAGS) $(LIBGSM) $(GSM_OBJECTS)/$(LD) -shared -Wl,-soname,libgsm.so -o $(LIBGSM) $(GSM_OBJECTS) -lc/' \
  -      -e '/$(RANLIB) $(LIBGSM)/d'
  -  '';
  +    /* Fix include directory */ ''
  +      sed -i Makefile \
  +        -e 's,$(GSM_INSTALL_ROOT)/inc,$(GSM_INSTALL_ROOT)/include/gsm,'
  +    '' + optionalString (!staticSupport)
  +    /* Build ELF shared object */ ''
  +      sed -i Makefile \
  +        -e 's,libgsm.a,libgsm.so,' \
  +        -e 's/$(AR) $(ARFLAGS) $(LIBGSM) $(GSM_OBJECTS)/$(LD) -shared -Wl,-soname,libgsm.so -o $(LIBGSM) $(GSM_OBJECTS) -lc/' \
  +        -e '/$(RANLIB) $(LIBGSM)/d'
  +    '';
   
     makeFlags = [
       "SHELL=${stdenv.shell}"
  
positive.code: 
    preInstall = "mkdir -pv $out/{bin,lib,man/man1,man/man3,include/gsm}";
  
    enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      description = "Lossy speech compression codec";
      homepage = http://www.quut.com/gsm/;
  
negative.code: { stdenv
  , fetchurl
  
  , staticSupport ? false
  }:
  
  