diff -up ./assimp.pc.in.pkgconfig ./assimp.pc.in
--- ./assimp.pc.in.pkgconfig	2021-02-27 18:08:34.032990798 -0500
+++ ./assimp.pc.in	2021-02-27 18:09:21.019110197 -0500
@@ -1,7 +1,7 @@
 prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@/
-libdir=@CMAKE_INSTALL_PREFIX@/@ASSIMP_LIB_INSTALL_DIR@
-includedir=@CMAKE_INSTALL_PREFIX@/../include/@ASSIMP_INCLUDE_INSTALL_DIR@
+exec_prefix=@ASSIMP_BIN_INSTALL_DIR@
+libdir=@ASSIMP_LIB_INSTALL_DIR@
+includedir=@ASSIMP_INCLUDE_INSTALL_DIR@/assimp
 
 Name: @CMAKE_PROJECT_NAME@
 Description: Import various well-known 3D model formats in an uniform manner.