我正在尝试修复 pidgin facebook 但是我收到这样的错误：
configure: error: Package requirements (purple < 3) were not met:
No package 'purple' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables PURPLE_CFLAGS
and PURPLE_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
有人可以帮我弄这个吗？