--- mlpack-2.0.1/CMakeLists.txt	2016-02-04 17:40:47.000000000 -0500
+++ mlpack-2.0.1/CMakeLists.txt.new	2016-02-25 10:28:24.838953428 -0500
@@ -100,6 +100,12 @@
   add_definitions(-DARMA_EXTRA_DEBUG)
 endif(ARMA_EXTRA_DEBUG)
 
+if(LIBDIR)
+  message(STATUS "Setting library install directory to ${LIBDIR}.")
+else(LIBDIR)
+  set(LIBDIR "lib") # Default.
+endif()
+
 # Now, find the libraries we need to compile against.  Several variables can be
 # set to manually specify the directory in which each of these libraries
 # resides.
--- mlpack-2.0.1/src/mlpack/CMakeLists.txt	2016-02-04 17:40:47.000000000 -0500
+++ mlpack-2.0.1/src/mlpack/CMakeLists.txt.new	2016-02-25 10:29:07.231238207 -0500
@@ -75,8 +75,8 @@
 # be entered...
 install(TARGETS mlpack
   RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib)
+  LIBRARY DESTINATION ${LIBDIR}
+  ARCHIVE DESTINATION ${LIBDIR})
 
 add_dependencies(mlpack mlpack_headers)