File qt5-dont-use-winflex.patch of Package mingw32-libqt5-qtbase
diff --git a/src/angle/src/compiler/preprocessor/preprocessor.pro b/src/angle/src/compiler/preprocessor/preprocessor.pro
index 420cb90..5f275ac 100644
--- a/src/angle/src/compiler/preprocessor/preprocessor.pro
+++ b/src/angle/src/compiler/preprocessor/preprocessor.pro
@@ -41,7 +41,7 @@ SOURCES += \
$$ANGLE_DIR/src/compiler/preprocessor/Token.cpp
# NOTE: 'win_flex' and 'bison' can be found in qt5/gnuwin32/bin
-flex.commands = $$addGnuPath(win_flex) --noline --nounistd --outfile=${QMAKE_FILE_BASE}.cpp ${QMAKE_FILE_NAME}
+flex.commands = $$addGnuPath(flex) --noline --nounistd --outfile=${QMAKE_FILE_BASE}.cpp ${QMAKE_FILE_NAME}
flex.output = ${QMAKE_FILE_BASE}.cpp
flex.input = FLEX_SOURCES
flex.dependency_type = TYPE_C
diff --git a/src/angle/src/compiler/translator.pro b/src/angle/src/compiler/translator.pro
index 6f0128d..3a35b3d 100644
--- a/src/angle/src/compiler/translator.pro
+++ b/src/angle/src/compiler/translator.pro
@@ -150,7 +150,7 @@ SOURCES += \
# NOTE: 'win_flex' and 'bison' can be found in qt5/gnuwin32/bin
-flex.commands = $$addGnuPath(win_flex) --noline --nounistd --outfile=${QMAKE_FILE_BASE}_lex.cpp ${QMAKE_FILE_NAME}
+flex.commands = $$addGnuPath(flex) --noline --nounistd --outfile=${QMAKE_FILE_BASE}_lex.cpp ${QMAKE_FILE_NAME}
flex.output = ${QMAKE_FILE_BASE}_lex.cpp
flex.input = FLEX_SOURCES
flex.dependency_type = TYPE_C