diff --git a/build_cmake.sh b/build_cmake.sh
index 3f261e7..f081647 100755
--- a/build_cmake.sh
+++ b/build_cmake.sh
@@ -8,7 +8,6 @@ CMakeDir=${SIS_CMAKE_BUILD_DIR:-$Dir/_build}
 if [[ -n "$MSYSTEM" ]]; then
 
   DefaultMakeCmd=mingw32-make.exe
-  MinGW=1
 else
 
   DefaultMakeCmd=make
diff --git a/clean_cmake.sh b/clean_cmake.sh
index 96b6c07..b2e61b3 100755
--- a/clean_cmake.sh
+++ b/clean_cmake.sh
@@ -8,7 +8,6 @@ CMakeDir=${SIS_CMAKE_BUILD_DIR:-$Dir/_build}
 if [[ -n "$MSYSTEM" ]]; then
 
   DefaultMakeCmd=mingw32-make.exe
-  MinGW=1
 else
 
   DefaultMakeCmd=make
diff --git a/prepare_cmake.sh b/prepare_cmake.sh
index 417cb1b..6529aa9 100755
--- a/prepare_cmake.sh
+++ b/prepare_cmake.sh
@@ -8,7 +8,6 @@ CMakeDir=${SIS_CMAKE_BUILD_DIR:-$Dir/_build}
 if [[ -n "$MSYSTEM" ]]; then
 
   DefaultMakeCmd=mingw32-make.exe
-  MinGW=1
 else
 
   DefaultMakeCmd=make