Don't distribute libexpat.la.

.la files are "libtool library files" – static library metadata files
generated by GNU libtool.  We don't need these since we provide all of
our metadata in binary packages' control files.

For example, here is the .la file for libexpat.so.1:

    # libexpat.la - a libtool library file
    # Generated by libtool (GNU libtool) 2.4 Debian-2.4-2ubuntu1
    #
    # Please DO NOT delete this file!
    # It is necessary for linking the library.

    # The name that we can dlopen(3).
    dlname='libexpat.so.1'

    # Names of this library.
    library_names='libexpat.so.1.6.0 libexpat.so.1 libexpat.so'

    # The name of the static archive.
    old_library='libexpat.a'

    # Linker flags that can not go in dependency_libs.
    inherited_linker_flags=''

    # Libraries that this one depends upon.
    dependency_libs=''

    # Names of additional weak libraries provided by this library
    weak_library_names=''

    # Version information for libexpat.
    current=7
    age=6
    revision=0

    # Is this an already installed library?
    installed=yes

    # Should we warn about portability when linking against -modules?
    shouldnotlink=no

    # Files to dlopen/dlpreopen
    dlopen=''
    dlpreopen=''

    # Directory that this library needs to be installed in:
    libdir='/usr/lib'

1 files changed, 0 insertions, 1 deletions

diff --git a/libexpat.1-dev.pkg/files b/libexpat.1-dev.pkg/files
index 1e514a6..a694528 100644
--- a/libexpat.1-dev.pkg/files
+++ b/libexpat.1-dev.pkg/files
@@ -1,4 +1,3 @@
 /usr/include
 /usr/lib/libexpat.a
-/usr/lib/libexpat.la
 /usr/lib/pkgconfig