diff --git a/modules/ECMGeneratePkgConfigFile.cmake b/modules/ECMGeneratePkgConfigFile.cmake
--- a/modules/ECMGeneratePkgConfigFile.cmake
+++ b/modules/ECMGeneratePkgConfigFile.cmake
@@ -158,12 +158,12 @@
   if(IS_ABSOLUTE "${EGPF_INCLUDE_INSTALL_DIR}")
       set(PKGCONFIG_TARGET_INCLUDES "${EGPF_INCLUDE_INSTALL_DIR}")
   else()
-      set(PKGCONFIG_TARGET_INCLUDES "${CMAKE_INSTALL_PREFIX}/${EGPF_INCLUDE_INSTALL_DIR}")
+      set(PKGCONFIG_TARGET_INCLUDES "\${prefix}/${EGPF_INCLUDE_INSTALL_DIR}")
   endif()
   if(IS_ABSOLUTE "${EGPF_LIB_INSTALL_DIR}")
       set(PKGCONFIG_TARGET_LIBS "${EGPF_LIB_INSTALL_DIR}")
   else()
-      set(PKGCONFIG_TARGET_LIBS "${CMAKE_INSTALL_PREFIX}/${EGPF_LIB_INSTALL_DIR}")
+      set(PKGCONFIG_TARGET_LIBS "\${prefix}/${EGPF_LIB_INSTALL_DIR}")
   endif()
   set(PKGCONFIG_TARGET_DESCRIPTION "${EGPF_DESCRIPTION}")
   set(PKGCONFIG_TARGET_DEFINES "")
@@ -179,14 +179,14 @@
   file(WRITE ${PKGCONFIG_FILENAME}
 "
 prefix=${CMAKE_INSTALL_PREFIX}
-exec_prefix=${CMAKE_INSTALL_PREFIX}
-libdir=${CMAKE_INSTALL_PREFIX}/${EGPF_LIB_INSTALL_DIR}
+exec_prefix=\${prefix}
+libdir=\${prefix}/${EGPF_LIB_INSTALL_DIR}
 includedir=${PKGCONFIG_TARGET_INCLUDES}
 
 Name: ${PKGCONFIG_TARGET_LIBNAME}
 Description: ${PKGCONFIG_TARGET_DESCRIPTION}
 Version: ${PROJECT_VERSION}
-Libs: -L${CMAKE_INSTALL_PREFIX}/${EGPF_LIB_INSTALL_DIR} -l${PKGCONFIG_TARGET_LIBNAME}
+Libs: -L\${prefix}/${EGPF_LIB_INSTALL_DIR} -l${PKGCONFIG_TARGET_LIBNAME}
 Cflags: -I${PKGCONFIG_TARGET_INCLUDES} ${PKGCONFIG_TARGET_DEFINES}
 Requires: ${PKGCONFIG_TARGET_DEPS}
 "
diff --git a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons.pc b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons.pc
--- a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons.pc
+++ b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons.pc
@@ -1,11 +1,12 @@
+
 prefix=/usr
-exec_prefix=/usr
-libdir=/usr/lib
-includedir=/usr/KCoreAddons
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include/KF5CoreAddons
 
 Name: KF5CoreAddons
 Description: KF5CoreAddons test
 Version: 5.43
-Libs: -L/usr/lib -lKF5CoreAddons
-Cflags: -I/usr/KCoreAddons 
+Libs: -L${prefix}/lib -lKF5CoreAddons
+Cflags: -I${prefix}/include/KF5CoreAddons 
 Requires: Qt5Core
diff --git a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons2.pc b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons2.pc
--- a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons2.pc
+++ b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons2.pc
@@ -1,11 +1,12 @@
+
 prefix=/usr
-exec_prefix=/usr
-libdir=/usr/lib
+exec_prefix=${prefix}
+libdir=${prefix}/lib
 includedir=/usr/KCoreAddons
 
 Name: KF5CoreAddons2
 Description: Addons to QtCore
 Version: 5.43
-Libs: -L/usr/lib -lKF5CoreAddons2
+Libs: -L${prefix}/lib -lKF5CoreAddons2
 Cflags: -I/usr/KCoreAddons 
 Requires: Qt5Core
diff --git a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons3.pc b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons3.pc
--- a/tests/ECMGeneratePkgConfigFile/KF5CoreAddons3.pc
+++ b/tests/ECMGeneratePkgConfigFile/KF5CoreAddons3.pc
@@ -1,11 +1,12 @@
+
 prefix=/usr
-exec_prefix=/usr
-libdir=/usr/lib
+exec_prefix=${prefix}
+libdir=${prefix}/lib
 includedir=/usr/KCoreAddons
 
 Name: KF5CoreAddons3
 Description: KF5CoreAddons3 library.
 Version: 5.43
-Libs: -L/usr/lib -lKF5CoreAddons3
+Libs: -L${prefix}/lib -lKF5CoreAddons3
 Cflags: -I/usr/KCoreAddons 
 Requires: Qt5Core
diff --git a/tests/ECMGeneratePkgConfigFile/run_test.cmake.config b/tests/ECMGeneratePkgConfigFile/run_test.cmake.config
--- a/tests/ECMGeneratePkgConfigFile/run_test.cmake.config
+++ b/tests/ECMGeneratePkgConfigFile/run_test.cmake.config
@@ -51,7 +51,6 @@
 ecm_generate_pkgconfig_file(BASE_NAME KF5CoreAddons
                             DESCRIPTION "KF5CoreAddons test"
                             DEPS Qt5Core
-                            INCLUDE_INSTALL_DIR /usr/KCoreAddons
                             FILENAME_VAR OutputFile)
 
 compare_files(GENERATED ${OutputFile}