--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,7 +87,7 @@
 option(EIGEN_BUILD_DEMOS "Toggles the building of the Eigen demos" ${PROJECT_IS_TOP_LEVEL})
 
 # Disable pkgconfig only for native Windows builds
-if(NOT WIN32 OR NOT CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
+if(NOT MSVC)
   option(EIGEN_BUILD_PKGCONFIG "Build pkg-config .pc file for Eigen" ${PROJECT_IS_TOP_LEVEL})
 endif()
 option(EIGEN_BUILD_CMAKE_PACKAGE "Enables the creation of EigenConfig.cmake and related files" ${PROJECT_IS_TOP_LEVEL})
--- a/eigen3.pc.in
+++ b/eigen3.pc.in
@@ -1,9 +1,11 @@
 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/@INCLUDE_INSTALL_DIR@
 
 Name: Eigen3
 Description: A C++ template library for linear algebra: vectors, matrices, and related algorithms
 Requires:
 Version: @EIGEN_VERSION_NUMBER@
 Libs:
-Cflags: -I${prefix}/@INCLUDE_INSTALL_DIR@
+Cflags: -I${includedir}