diff --git a/CMakeLists.txt b/CMakeLists.txt
index cee6717..d1a6dfa 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,10 +11,17 @@ set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-set(OUTPUT_DIRECTORY "${PROJECT_SOURCE_DIR}/out")
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}/lib")
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}/lib")
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}")
+if (DEFINED CUSTOM_INSTALL_PREFIX)
+    set(OUTPUT_DIRECTORY "${CUSTOM_INSTALL_PREFIX}/Discregrid")
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CUSTOM_INSTALL_PREFIX}/lib")
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CUSTOM_INSTALL_PREFIX}/lib")
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CUSTOM_INSTALL_PREFIX}")
+else()
+    set(OUTPUT_DIRECTORY "${PROJECT_SOURCE_DIR}/out")
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}/lib")
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}/lib")
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${OUTPUT_DIRECTORY}")
+endif()
 
 
 # Enable simultaneous compilation of source files.
diff --git a/discregrid/CMakeLists.txt b/discregrid/CMakeLists.txt
index 9cd13f9..964dfe3 100755
--- a/discregrid/CMakeLists.txt
+++ b/discregrid/CMakeLists.txt
@@ -101,14 +101,14 @@ endif()
 # Set link libraries.
 target_link_libraries(Discregrid)
 
-if (DEFINED ${CMAKE_INSTALL_PREFIX})
+if (DEFINED CUSTOM_INSTALL_PREFIX)
     install(TARGETS Discregrid
-    RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/Discregrid/bin
-    LIBRARY DESTINATION ${CMAKE_INSTALL_PREFIX}/Discregrid/lib
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_PREFIX}/Discregrid/lib)
+    RUNTIME DESTINATION ${CUSTOM_INSTALL_PREFIX}/Discregrid/bin
+    LIBRARY DESTINATION ${CUSTOM_INSTALL_PREFIX}/Discregrid/lib
+    ARCHIVE DESTINATION ${CUSTOM_INSTALL_PREFIX}/Discregrid/lib)
 
     install(DIRECTORY include
-    DESTINATION ${CMAKE_INSTALL_PREFIX}/Discregrid
+    DESTINATION ${CUSTOM_INSTALL_PREFIX}/Discregrid
     PATTERN "*.hpp")
 else()
     install(TARGETS Discregrid