diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9754d35..2b53eb0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,6 +112,8 @@ set_cache(BUILD "" STRING
 if (BUILD)
   if (BUILD STREQUAL all)
     set(MP_MODULES all)
+  elseif (BUILD STREQUAL no)
+    set(MP_MODULES)
   else ()
     string(REGEX MATCHALL "[^,]+" MP_MODULES "${BUILD}")
   endif ()
@@ -268,7 +270,7 @@ function (add_mp_library name)
     add_dependencies(${name} ${add_mp_library_DEPENDS})
   endif ()
   # Add library linked with dynamic runtime.
-  if (MSVC)
+  if (0)
     add_library(${name}-dynrt ${libtype} EXCLUDE_FROM_ALL
       ${add_mp_library_UNPARSED_ARGUMENTS} ${dynrt-objects})
     target_compile_options(${name}-dynrt PUBLIC /MD$<$<CONFIG:Debug>:d>)
diff --git a/include/mp/format.h b/include/mp/format.h
index 8320f8a..0314973 100644
--- a/include/mp/format.h
+++ b/include/mp/format.h
@@ -40,7 +40,7 @@
 #include <vector>
 #include <utility>
 
-#ifdef _SECURE_SCL
+#if defined(_SECURE_SCL) && defined(_MSC_VER) && _MSC_VER < 1951
 # define FMT_SECURE_SCL _SECURE_SCL
 #else
 # define FMT_SECURE_SCL 0