pkg-config generating incorrect libdir and includedir

[poscat0x04]

build log: https://fars.ee/PUi5
The generated rime.pc:

prefix=/nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1
exec_prefix=/nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1
libdir=/nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1//nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1/lib
includedir=/nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1//nix/store/48ywhfwynqww0c1n0b6h1bv07hws7q1n-librime-1.6.1/include

Name: Rime
Description: Rime Input Method Engine
Version: 1.6.1
Cflags: -I${includedir}
Libs: -L${libdir} -lrime

Note that both CMAKE_INSTALL_PREFIX and CMAKE_INSTALL_BINDIR can be absolute paths so concatenating them does not guarantee to yield a meaningful path.

relevant part of CMakeList.txt

This is caused by commit 0e96e51 and #327

[lotem]

Confirmed.
${CMAKE_INSTALL_FULL_*DIR} should be used.
Reference: https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html