serf-1.pc file has incorrect paths

$ cat /usr/lib/x86_64-linux-gnu/pkgconfig/serf-1.pc
SERF_MAJOR_VERSION=1
prefix=/usr/local
exec_prefix=${prefix}
libdir=/usr/local/lib
includedir=${prefix}/include/serf-1

Name: serf
Description: HTTP client library
Version: 1.3.7
Requires.private: libssl libcrypto
Libs: -L${libdir} -lserf-${SERF_MAJOR_VERSION}
Libs.private: -L/usr/lib/x86_64-linux-gnu -laprutil-1 -L/usr/lib/x86_64-linux-gnu -lapr-1 -Wl,-Bsymbolic-functions -Wl,-z,relro -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lz
Cflags: -I${includedir}

Note that prefix should be /usr and libdir should be /usr/lib/x86_64-linux-gnu

This problem manifests itself as Subversion being unable to build with this package since it can't find the serf.h file since it isn't in /usr/local/include/serf-1 as pkg-config is telling it.