diff --git a/contrib/10.regexp/cmake/FindREGEX.cmake b/cmake/FindREGEX.cmake
similarity index 100%
rename from contrib/10.regexp/cmake/FindREGEX.cmake
rename to cmake/FindREGEX.cmake
diff --git a/contrib/10.partcont/CMakeLists.txt b/contrib/10.partcont/CMakeLists.txt
index bedbbd75..65f16fb2 100644
--- a/contrib/10.partcont/CMakeLists.txt
+++ b/contrib/10.partcont/CMakeLists.txt
@@ -1,2 +1,2 @@
-file(GLOB PARTCONT_FILES ${PICRIN_CONTRIB_DIR}/10.partcont/piclib/*.scm)
+file(GLOB PARTCONT_FILES ${PROJECT_SOURCE_DIR}/contrib/10.partcont/piclib/*.scm)
 list(APPEND PICLIB_CONTRIB_LIBS ${PARTCONT_FILES})
diff --git a/contrib/10.pretty-print/CMakeLists.txt b/contrib/10.pretty-print/CMakeLists.txt
index c5353018..cf0327da 100644
--- a/contrib/10.pretty-print/CMakeLists.txt
+++ b/contrib/10.pretty-print/CMakeLists.txt
@@ -1 +1 @@
-list(APPEND PICLIB_CONTRIB_LIBS ${PICRIN_CONTRIB_DIR}/10.pretty-print/pretty-print.scm)
+list(APPEND PICLIB_CONTRIB_LIBS ${PROJECT_SOURCE_DIR}/contrib/10.pretty-print/pretty-print.scm)
diff --git a/contrib/10.regexp/CMakeLists.txt b/contrib/10.regexp/CMakeLists.txt
index aa177aaa..6ab06aaa 100644
--- a/contrib/10.regexp/CMakeLists.txt
+++ b/contrib/10.regexp/CMakeLists.txt
@@ -1,14 +1,11 @@
 # regex
-set(PICRIN_REGEX_DIR ${PICRIN_CONTRIB_DIR}/10.regexp)
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PICRIN_REGEX_DIR}/cmake/")
-
 find_package(REGEX)
 
 if (REGEX_FOUND)
   add_definitions(${REGEX_DEFINITIONS})
   include_directories(${REGEX_INCLUDE_DIR})
 
-  file(GLOB PICRIN_REGEX_SOURCES ${PICRIN_REGEX_DIR}/src/*.c)
+  file(GLOB PICRIN_REGEX_SOURCES ${PROJECT_SOURCE_DIR}/contrib/10.regexp/src/*.c)
 
   list(APPEND PICRIN_CONTRIB_INITS regexp)
   list(APPEND PICRIN_CONTRIB_LIBRARIES ${REGEX_LIBRARIES})
diff --git a/contrib/20.for/CMakeLists.txt b/contrib/20.for/CMakeLists.txt
index 9b0f64f0..ebe66a42 100644
--- a/contrib/20.for/CMakeLists.txt
+++ b/contrib/20.for/CMakeLists.txt
@@ -1,2 +1,2 @@
-file(GLOB FOR_FILES ${PICRIN_CONTRIB_DIR}/20.for/piclib/*.scm)
+file(GLOB FOR_FILES ${PROJECT_SOURCE_DIR}/contrib/20.for/piclib/*.scm)
 list(APPEND PICLIB_CONTRIB_LIBS ${FOR_FILES})
diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 50c586de..11050d90 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -1,5 +1,4 @@
-set(PICRIN_CONTRIB_DIR ${PROJECT_SOURCE_DIR}/contrib)
-file(GLOB CONTRIBS ${PICRIN_CONTRIB_DIR}/*/CMakeLists.txt)
+file(GLOB CONTRIBS ${PROJECT_SOURCE_DIR}/contrib/*/CMakeLists.txt)
 list(SORT CONTRIBS)
 foreach(contrib ${CONTRIBS})
   include(${contrib})