Ninja error: xmlparse.c

Hello, this is my first time posting on forums so im sorry if there are any errors, when i try to compile skia using ninja -C out/Release skia, it gives me this:

ninja: Entering directory `out/Release'
ninja: error: '../../third_party/externals/expat/expat/lib/xmlparse.c', needed by 'obj/third_party/externals/expat/expat/lib/libexpat.xmlparse.o', missing and no known rule to make it

what do i do?