Comment 26 for bug 184225

looks like it is installed. Here is the list and locations.
hope it helps you out.

/usr/share/doc/pixman-0.9.5
/usr/lib/libpixman-1.so.0
/usr/lib/libpixman-1.la
/usr/lib/libpixman-1.a
/usr/lib/libpixman-1.so
/usr/lib/libpixman-1.so.0.9.5
/usr/lib/pkgconfig/pixman-1.pc
/usr/include/pixman-1
/usr/include/pixman-1/pixman.h