diff --git a/nc_cxx.cmake b/nc_cxx.cmake
index f91b481..6549cd7 100644
--- a/nc_cxx.cmake
+++ b/nc_cxx.cmake
@@ -42,22 +42,22 @@ append_compile_flag ("-stdlib=libc++")
 # discovered.
 if (NOT DEFINED __nc_cxx_stdcxxfs)
     foreach(lib "" "c++fs" "c++experimental" "stdc++fs")
-        if (NOT __nc_cxx_stdcxxfs)
-            message (STATUS "Trying c++fs library '${lib}'")
-            try_compile(
-                __nc_cxx_stdcxxfs ${CMAKE_CURRENT_BINARY_DIR}
-            SOURCES
-                ${NC_CMAKE_BASE}/nc_cxx_stdcxxfs.cpp
-            LINK_LIBRARIES
-                ${lib})
+        message (STATUS "Trying c++fs library '${lib}'")
+        try_compile(
+            __nc_cxx_stdcxxfs ${CMAKE_CURRENT_BINARY_DIR}
+        SOURCES
+            ${NC_CMAKE_BASE}/nc_cxx_stdcxxfs.cpp
+        LINK_LIBRARIES
+            ${lib}
+        )
 
-            if (__nc_cxx_stdcxxfs)
-                set (__nc_cxx_stdcxxfs "${lib}" CACHE INTERNAL "library required for c++ filesystem")
-            endif ()
+        if (__nc_cxx_stdcxxfs)
+            set (__nc_cxx_stdcxxfs "${lib}" CACHE INTERNAL "library required for c++ filesystem")
+            break ()
         endif ()
     endforeach()
 
-    if (NOT __nc_cxx_stdcxxfs)
+    if (NOT DEFINED __nc_cxx_stdcxxfs)
         message (FATAL_ERROR "Could not locate the required c++fs library")
     endif ()