diff --git a/emulators/flexemu/Makefile b/emulators/flexemu/Makefile
index 0dedff9752c7..8c44dde04c64 100644
--- a/emulators/flexemu/Makefile
+++ b/emulators/flexemu/Makefile
@@ -1,38 +1,35 @@
 PORTNAME=	flexemu
 DISTVERSIONPREFIX=	V
-DISTVERSION=	3.27
+DISTVERSION=	3.30
 CATEGORIES=	emulators
 
 MAINTAINER=	rhurlin@FreeBSD.org
 COMMENT=	MC6809 emulator running FLEX operating system
 WWW=		https://flexemu.neocities.org/
 
 LICENSE=	GPLv2
 
-USES=		compiler desktop-file-utils gl libtool ncurses \
-		pkgconfig qt:5 shared-mime-info xorg
+USES=		cmake compiler:c++17-lang desktop-file-utils gl libtool \
+		ncurses qt:6 shared-mime-info xorg
 USE_GITHUB=	yes
 GH_ACCOUNT=	aladur
 GH_TUPLE=	fmtlib:fmt:0c9fce2:fmt/fmt \
 		google:googletest:b514bdc:googletest/googletest \
 		open-source-parsers:jsoncpp:8214f71:jsoncpp/jsoncpp
-USE_GL=		gl
-USE_QT=		buildtools:build core dbus gui network printsupport \
-		qmake:build widgets x11extras
+USE_GL=		gl opengl
+USE_QT=		base declarative
 USE_XORG=	ice sm x11
 
-GNU_CONFIGURE=	yes
+# The minimum supported clang-tidy version is 19.0.0
+CMAKE_ARGS+=	-DFLEXEMU_QT_MAJOR_VERSION=6 \
+		-DCLANG_TIDY=${LOCALBASE}/bin/clang-tidy${COMPILER_VERSION:C/.$//} \
+		-DRUN_CLANG_TIDY=${LOCALBASE}/llvm${COMPILER_VERSION:C/.$//}/bin/run-clang-tidy
 
-post-install:
-	@${RM} ${STAGEDIR}${PREFIX}/bin/rcvflex
-	@${RM} ${STAGEDIR}${PREFIX}/bin/send2flx
-	@${RM} ${STAGEDIR}${PREFIX}/bin/testdaa
+# test target has build errors atm.
+test:
+	@cd ${WRKDIR}/.build && \
+		${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} ${CMAKE_SOURCE_PATH} && \
+		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} ${ALL_TARGET} && \
+		${BUILD_WRKSRC}/test
 
-.include <bsd.port.pre.mk>
-
-.if ${COMPILER_TYPE} == gcc
-USE_GCC=	yes
-CONFIGURE_ARGS=	--disable-precompiled-headers
-.endif
-
-.include <bsd.port.post.mk>
+.include <bsd.port.mk>
diff --git a/emulators/flexemu/distinfo b/emulators/flexemu/distinfo
index b0773f285f73..9835ceb16053 100644
--- a/emulators/flexemu/distinfo
+++ b/emulators/flexemu/distinfo
@@ -1,9 +1,9 @@
-TIMESTAMP = 1735567222
-SHA256 (aladur-flexemu-V3.27_GH0.tar.gz) = 771657df523d68ebbe1d64778e67c591ddda101364627f1daf0f8e92efd4bfb4
-SIZE (aladur-flexemu-V3.27_GH0.tar.gz) = 11350853
+TIMESTAMP = 1758397524
+SHA256 (aladur-flexemu-V3.30_GH0.tar.gz) = 5146c1f9b6871a015a04ad04141984f5f887373a30b72bd44a28d2d898450002
+SIZE (aladur-flexemu-V3.30_GH0.tar.gz) = 11457428
 SHA256 (fmtlib-fmt-0c9fce2_GH0.tar.gz) = dd7dd5ef9e4677e8466a3f939613d1f73876c511a9a1be4857fb62590c110ca3
 SIZE (fmtlib-fmt-0c9fce2_GH0.tar.gz) = 701040
 SHA256 (google-googletest-b514bdc_GH0.tar.gz) = dcefc4adaca27f89b69371eadef42c4d311d2debfdee2a9a5985cae740463f98
 SIZE (google-googletest-b514bdc_GH0.tar.gz) = 872710
 SHA256 (open-source-parsers-jsoncpp-8214f71_GH0.tar.gz) = ac618109663963435516dcef05773d185f99d6cafbcec59bf2ba3e08c050f6a6
 SIZE (open-source-parsers-jsoncpp-8214f71_GH0.tar.gz) = 212844