diff --git a/CMakeLists.txt b/CMakeLists.txt
index 09a9928c..af6075c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ include(CheckIncludeFile)
 include(CheckSymbolExists)
 include(CMakePushCheckState)
 include(GenerateExportHeader)
+include(GNUInstallDirs)
 
 cmake_push_check_state(RESET)
 
@@ -78,7 +79,7 @@ if(HAVE_MATH_LIBM)
   set_target_properties(math PROPERTIES INTERFACE_LINK_LIBRARIES m)
 endif()
 
-set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_LIBDIR})
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 option(BUILD_SHARED_LIBS "Prefer to build shared lib" ON)
diff --git a/thanm.old/CMakeLists.txt b/thanm.old/CMakeLists.txt
index 067b98fb..37f95737 100644
--- a/thanm.old/CMakeLists.txt
+++ b/thanm.old/CMakeLists.txt
@@ -3,5 +3,5 @@ add_executable(thanm.old
   thanm.h image.h
 )
 target_link_libraries(thanm.old PRIVATE util $<$<BOOL:${PNG_FOUND}>:PNG::PNG> setargv thtk_warning)
-install(TARGETS thanm.old DESTINATION bin)
-install(FILES thanm.old.1 DESTINATION share/man/man1)
+install(TARGETS thanm.old DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thanm.old.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thanm/CMakeLists.txt b/thanm/CMakeLists.txt
index 41b0c660..08d08d97 100644
--- a/thanm/CMakeLists.txt
+++ b/thanm/CMakeLists.txt
@@ -10,5 +10,5 @@ add_executable(thanm
 )
 target_include_directories(thanm PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 target_link_libraries(thanm PRIVATE util $<$<BOOL:${PNG_FOUND}>:PNG::PNG> math setargv thtk_warning)
-install(TARGETS thanm DESTINATION bin)
-install(FILES thanm.1 DESTINATION share/man/man1)
+install(TARGETS thanm DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thanm.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thdat/CMakeLists.txt b/thdat/CMakeLists.txt
index 9bb7f7d7..48d55e95 100644
--- a/thdat/CMakeLists.txt
+++ b/thdat/CMakeLists.txt
@@ -1,5 +1,5 @@
 include_directories(${CMAKE_SOURCE_DIR})
 add_executable(thdat thdat.c)
 target_link_libraries(thdat PRIVATE thtk util setargv thtk_warning $<$<BOOL:${OPENMP_FOUND}>:OpenMP::OpenMP_C>)
-install(TARGETS thdat DESTINATION bin)
-install(FILES thdat.1 DESTINATION share/man/man1)
+install(TARGETS thdat DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thdat.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thecl/CMakeLists.txt b/thecl/CMakeLists.txt
index 12945530..b9ef841c 100644
--- a/thecl/CMakeLists.txt
+++ b/thecl/CMakeLists.txt
@@ -9,5 +9,5 @@ add_executable(thecl
   expr.c thecl.c eclmap.c thecl06.c thecl10.c
   expr.h thecl.h eclmap.h)
 target_link_libraries(thecl PRIVATE util math setargv thtk_warning)
-install(TARGETS thecl DESTINATION bin)
-install(FILES thecl.1 DESTINATION share/man/man1)
+install(TARGETS thecl DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thecl.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thmsg/CMakeLists.txt b/thmsg/CMakeLists.txt
index 41f5cb4e..f58a874c 100644
--- a/thmsg/CMakeLists.txt
+++ b/thmsg/CMakeLists.txt
@@ -3,5 +3,5 @@ add_executable(thmsg
   thmsg.h
 )
 target_link_libraries(thmsg PRIVATE util setargv thtk_warning)
-install(TARGETS thmsg DESTINATION bin)
-install(FILES thmsg.1 DESTINATION share/man/man1)
+install(TARGETS thmsg DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thmsg.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thstd/CMakeLists.txt b/thstd/CMakeLists.txt
index 131dd506..48b0a0f9 100644
--- a/thstd/CMakeLists.txt
+++ b/thstd/CMakeLists.txt
@@ -3,5 +3,5 @@ add_executable(thstd
   thstd.h
 )
 target_link_libraries(thstd PRIVATE util setargv thtk_warning)
-install(TARGETS thstd DESTINATION bin)
-install(FILES thstd.1 DESTINATION share/man/man1)
+install(TARGETS thstd DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(FILES thstd.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/thtk/CMakeLists.txt b/thtk/CMakeLists.txt
index 56df0317..99cade41 100644
--- a/thtk/CMakeLists.txt
+++ b/thtk/CMakeLists.txt
@@ -29,10 +29,10 @@ find_package(PkgConfig)
 if (PKG_CONFIG_FOUND)
   configure_file(thtk.pc.in ${CMAKE_CURRENT_BINARY_DIR}/thtk.pc)
   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/thtk.pc
-    DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/pkgconfig)
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 endif()
 install(TARGETS thtk
-  ARCHIVE DESTINATION lib
-  LIBRARY DESTINATION lib
-  RUNTIME DESTINATION bin
-  PUBLIC_HEADER DESTINATION include/thtk)
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/thtk)
diff --git a/thtk/thtk.pc.in b/thtk/thtk.pc.in
index 9b05e9d1..e01742ed 100644
--- a/thtk/thtk.pc.in
+++ b/thtk/thtk.pc.in
@@ -1,10 +1,11 @@
 prefix = @CMAKE_INSTALL_PREFIX@
-exec_prefix = @CMAKE_INSTALL_PREFIX@
-libdir = @CMAKE_INSTALL_PREFIX@/lib
-includedir = @CMAKE_INSTALL_PREFIX@/include/thtk
+exec_prefix = {prefix}
+includedir = {prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir = {exec_prefix}/@CMAKE_INSTALL_LIBDIR@
 
 Name: @PROJECT_NAME@
 Description: Touhou Toolkit shared library
 URL: @PROJECT_URL@
 Version: @PROJECT_VERSION@
-Libs: -L@CMAKE_INSTALL_PREFIX@/lib -lthtk
+Libs: -L{libdir} -lthtk
+Cflags: -I{includedir}