diff -r 7038ecc1f7fa -r 1ae8d4582e1e cmake_modules/CheckHaskellModuleExists.cmake
--- a/cmake_modules/CheckHaskellModuleExists.cmake	Sun Nov 15 14:40:51 2015 +0100
+++ b/cmake_modules/CheckHaskellModuleExists.cmake	Sun Nov 15 14:42:59 2015 +0100
@@ -11,7 +11,7 @@
 
 macro(CHECK_HASKELL_MODULE_EXISTS MODULE FUNCTION PARAMCOUNT LIBRARY)
   set(VARIABLE "HS_MODULE_${LIBRARY}_${FUNCTION}")
-  if("${VARIABLE}" MATCHES "^${VARIABLE}$")
+  if(${VARIABLE} MATCHES ^${VARIABLE}$)
     message(STATUS "Looking for ${FUNCTION} in ${MODULE}")
 
     set(PARAMETERS "")