diff --git a/matrix.lua b/matrix.lua
index b79f500..32b37a2 100644
--- a/matrix.lua
+++ b/matrix.lua
@@ -43,6 +43,9 @@ This script maps this as follows:
 
 ]]
 
+package.cpath = package.cpath .. ";__NIX_LIB_PATH__"
+package.path = package.path .. ";__NIX_OLM_PATH__"
+
 local json = require 'cjson' -- apt-get install lua-cjson
 local olmstatus, olm = pcall(require, 'olm') -- LuaJIT olm FFI binding ln -s ~/olm/olm.lua /usr/local/share/lua/5.1
 local w = weechat
diff --git a/olm.lua b/olm.lua
index 114649c..4828371 100644
--- a/olm.lua
+++ b/olm.lua
@@ -17,6 +17,9 @@
  * limitations under the License.
  */
 --]]
+
+package.cpath = package.cpath .. ";__NIX_LIB_PATH__"
+
 local ffi = require'ffi'
 
 ffi.cdef[[