How to recompile the code when the header file changed?

Here is a test code in bakefile/tests/headers

After I run
bakefile -f msvc headers.bkl
nmake -f makefile.vc
bakefile works well.

I try to modify headers/test/hello.h
and run
nmake -f makefile.vc again
but nothing happened
and I found there is no header relation code in the file 'makefile.vc'

How to solve the problem? My bakefile version is 0.2.4

Thanks
JiangMiao

makefile.vc which bakefile generated:
# =========================================================================
#     This makefile was generated by
#     Bakefile 0.2.4 (http://www.bakefile.org)
#     Do not modify, all changes will be overwritten!
# =========================================================================



# -------------------------------------------------------------------------
# These are configurable options:
# -------------------------------------------------------------------------

# C compiler
CC = cl

# Standard flags for CC
CFLAGS =

# Standard preprocessor flags (common for CC and CXX)
CPPFLAGS =

# Standard linker flags
LDFLAGS =

#  [0,1]
BUILD_BOTH =



# -------------------------------------------------------------------------
# Do not modify the rest of this file!
# -------------------------------------------------------------------------

### Variables: ###

TESTLIB_CFLAGS =  /MD /DWIN32  $(CPPFLAGS) $(CFLAGS)
TESTLIB_OBJECTS =  \
    testlib_hello.obj
TESTLIB2_CFLAGS =  /MD /DWIN32  $(CPPFLAGS) $(CFLAGS)
TESTLIB2_OBJECTS =  \
    testlib2_hello.obj
TESTDLL_CFLAGS =  /MD /DWIN32 /DMAKING_THE_DLL   $(CPPFLAGS) $(CFLAGS)
TESTDLL_OBJECTS =  \
    testdll_hello.obj
TESTEXE_CFLAGS =  /MD /DWIN32  $(CPPFLAGS) $(CFLAGS)
TESTEXE_OBJECTS =  \
    testexe_hello.obj

### Conditionally set variables: ###

!if "$(BUILD_BOTH)" == "1"
__testlib2___depname = testlib2.lib
!endif


### Targets: ###

all: testlib.lib $(__testlib2___depname) myDLL.dll testexe.exe

clean:
    -if exist .\*.obj del .\*.obj
    -if exist .\*.res del .\*.res
    -if exist .\*.pch del .\*.pch
    -if exist testlib.lib del testlib.lib
    -if exist testlib2.lib del testlib2.lib
    -if exist myDLL.dll del myDLL.dll
    -if exist myDLL.ilk del myDLL.ilk
    -if exist myDLL.pdb del myDLL.pdb
    -if exist myLibrary.lib del myLibrary.lib
    -if exist testexe.exe del testexe.exe
    -if exist testexe.ilk del testexe.ilk
    -if exist testexe.pdb del testexe.pdb

testlib.lib: $(TESTLIB_OBJECTS)
    if exist $@ del $@
    link /LIB /NOLOGO /OUT:$@ @<<
    $(TESTLIB_OBJECTS)
<<

!if "$(BUILD_BOTH)" == "1"
testlib2.lib: $(TESTLIB2_OBJECTS)
    if exist $@ del $@
    link /LIB /NOLOGO /OUT:$@ @<<
    $(TESTLIB2_OBJECTS)
<<
!endif

myDLL.dll: $(TESTDLL_OBJECTS)
    link /DLL /NOLOGO /OUT:$@  $(LDFLAGS) @<<
    $(TESTDLL_OBJECTS)  /IMPLIB:myLibrary.lib
<<

testexe.exe: $(TESTEXE_OBJECTS)
    link /NOLOGO /OUT:$@  $(LDFLAGS) @<<
    $(TESTEXE_OBJECTS)
<<

testlib_hello.obj: .\hello.c
    $(CC) /c /nologo /TC /Fo$@ $(TESTLIB_CFLAGS) .\hello.c

testlib2_hello.obj: .\hello.c
    $(CC) /c /nologo /TC /Fo$@ $(TESTLIB2_CFLAGS) .\hello.c

testdll_hello.obj: .\hello.c
    $(CC) /c /nologo /TC /Fo$@ $(TESTDLL_CFLAGS) .\hello.c

testexe_hello.obj: .\hello.c
    $(CC) /c /nologo /TC /Fo$@ $(TESTEXE_CFLAGS) .\hello.c



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