diff --git a/configure.ac b/configure.ac
index 26b5cc4..648d018 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,9 @@
 AM_PROG_AR
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
+# Python
+AM_PATH_PYTHON([2.7], [AC_SUBST([PYTHON], [echo "$PYTHON"])],
+[AC_MSG_ERROR([Could not find python-2.7 installed...python-2.7 is required])])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AX_CXX_COMPILE_STDCXX_14([noext])
@@ -26,6 +29,16 @@
 # Checks for library functions.
 LT_INIT # Required for systemd linking
 
+# Add optional yaml file argument
+AC_ARG_VAR(FAN_DETECT_YAML_FILE,
+[The fan presence detection definition file to use])
+AS_IF([test "x$FAN_DETECT_YAML_FILE" == "x"],
+[FAN_DETECT_YAML_FILE="${srcdir}/example/fan-detect.yaml"])
+AC_DEFINE_UNQUOTED([FAN_DETECT_YAML_FILE], ["$FAN_DETECT_YAML_FILE"],
+[The fan presence detection definition file to use])
+
 # Create configured output
+AC_SUBST([GEN_FAN_DETECT_DEFS],
+[$PYTHON ${srcdir}/gen-fan-detect-defs.py -y $FAN_DETECT_YAML_FILE])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT