diff --git a/sys-utils/libcmt/Makefile b/sys-utils/libcmt/Makefile
index 100997a..0ad6894 100644
--- a/sys-utils/libcmt/Makefile
+++ b/sys-utils/libcmt/Makefile
@@ -14,216 +14,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-LIBCMT_VERSION ?=0.0.0
-
-INSTALL_FILE= install -m0644
-INSTALL_EXEC= install -m0755
-
-# paths
-PREFIX = /usr
-TARGET_PREFIX ?= $(PREFIX)
-
-TOOLCHAIN_PREFIX ?= riscv64-linux-gnu-
-TARGET_CC := $(TOOLCHAIN_PREFIX)gcc
-TARGET_AR := $(TOOLCHAIN_PREFIX)ar
-COMMON_CFLAGS := -Wvla -O2 -g -Wall -pedantic -Wextra -Isrc \
-                 -fno-strict-aliasing -fno-strict-overflow
-TARGET_CFLAGS := $(COMMON_CFLAGS) -ftrivial-auto-var-init=zero -Wstrict-aliasing=3
-CFLAGS := $(COMMON_CFLAGS)
-CC := gcc
-
-all: libcmt host
-host: mock tools
-#-------------------------------------------------------------------------------
-examples_SRC := \
-	doc/examples/abi_encode_000.c \
-	doc/examples/abi_encode_001.c \
-	doc/examples/abi_encode_002.c \
-	doc/examples/abi_decode_000.c \
-	doc/examples/abi_decode_001.c \
-	doc/examples/abi_decode_002.c \
-	doc/examples/io.c \
-	doc/examples/rollup.c
-
-examples_OBJDIR := build/examples
-examples_OBJ    := $(patsubst %.c,$(examples_OBJDIR)/%.o,$(examples_SRC))
-
-$(examples_OBJ): $(examples_OBJDIR)/%.o: %.c
-	@mkdir -p $(@D)
-	$(CC) $(CFLAGS) -MT $@ -MMD -MP -MF $(@:.o=.d) -c -o $@ $<
-
-# no need to link, just ensure examples build correctly
-examples: $(examples_OBJ)
-
-#-------------------------------------------------------------------------------
-libcmt_SRC := \
-	src/buf.c \
-	src/abi.c \
-	src/keccak.c \
-	src/merkle.c \
-	src/rollup.c \
-	src/util.c \
-	src/io.c
-
-libcmt_OBJDIR    := build/lib
-libcmt_OBJ       := $(patsubst %.c,$(libcmt_OBJDIR)/%.o,$(libcmt_SRC))
-libcmt_LIB       := $(libcmt_OBJDIR)/libcmt.a
-
-$(libcmt_OBJ): $(libcmt_OBJDIR)/%.o: %.c
-	@mkdir -p $(@D)
-	$(TARGET_CC) $(TARGET_CFLAGS) -MT $@ -MMD -MP -MF $(@:.o=.d) -c -o $@ $<
-
-$(libcmt_LIB): $(libcmt_OBJ)
-	$(TARGET_AR) rcs $@ $^
-
-libcmt: $(libcmt_LIB)
-install: $(libcmt_LIB)
-	mkdir -p $(TARGET_DESTDIR)$(TARGET_PREFIX)/lib
-	cp -f $< $(TARGET_DESTDIR)$(TARGET_PREFIX)/lib
-	mkdir -p $(TARGET_DESTDIR)$(TARGET_PREFIX)/include/libcmt/
-	cp -f src/*.h $(TARGET_DESTDIR)$(TARGET_PREFIX)/include/libcmt/
-	mkdir -p $(TARGET_DESTDIR)$(TARGET_PREFIX)/lib/pkgconfig
-	sed -e 's|@ARG_PREFIX@|$(TARGET_PREFIX)|g' src/libcmt.pc > $(TARGET_DESTDIR)$(TARGET_PREFIX)/lib/pkgconfig/libcmt.pc
-
-debian-package: install
-	mkdir -p $(TARGET_DESTDIR)/DEBIAN
-	sed 's|ARG_VERSION|$(LIBCMT_VERSION)|g;' tools/template/cross-control.template > $(TARGET_DESTDIR)/DEBIAN/control
-	dpkg-deb -Zxz --root-owner-group --build $(TARGET_DESTDIR) $(LIBCMT_DEB_FILENAME)
-
-#-------------------------------------------------------------------------------
-mock_SRC := \
-	src/abi.c \
-	src/buf.c \
-	src/keccak.c \
-	src/merkle.c \
-	src/rollup.c \
-	src/util.c \
-	src/io-mock.c
-
-mock_OBJDIR := build/mock
-mock_OBJ    := $(patsubst %.c,$(mock_OBJDIR)/%.o,$(mock_SRC))
-mock_LIB    := $(mock_OBJDIR)/libcmt.a
-
-$(mock_OBJ): $(mock_OBJDIR)/%.o: %.c
-	@mkdir -p $(@D)
-	$(CC) $(CFLAGS) -MT $@ -MMD -MP -MF $(@:.o=.d) -c -o $@ $<
-
-$(mock_LIB): $(mock_OBJ)
-	$(AR) rcs $@ $^
-
-mock: $(mock_LIB)
-
-install-mock: $(mock_LIB)
-	mkdir -p $(DESTDIR)$(PREFIX)/lib
-	cp -f $< $(DESTDIR)$(PREFIX)/lib
-	cp -f src/*.h $(DESTDIR)$(PREFIX)/include/libcmt/
-	mkdir -p $(DESTDIR)$(PREFIX)/lib/pkgconfig
-	sed -e 's|@ARG_PREFIX@|$(PREFIX)|g' src/libcmt_mock.pc > $(DESTDIR)$(PREFIX)/lib/pkgconfig/libcmt.pc
-
-#-------------------------------------------------------------------------------
-unittests_BINS := \
-	$(mock_OBJDIR)/abi-multi \
-	$(mock_OBJDIR)/abi-single \
-	$(mock_OBJDIR)/buf \
-	$(mock_OBJDIR)/gio \
-	$(mock_OBJDIR)/keccak \
-	$(mock_OBJDIR)/merkle \
-	$(mock_OBJDIR)/progress \
-	$(mock_OBJDIR)/rollup
-
-$(mock_OBJDIR)/abi-multi: tests/abi-multi.c $(mock_LIB)
-	$(CC) $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/abi-single: tests/abi-single.c $(mock_LIB)
-	$(CC) $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/buf: tests/buf.c $(mock_LIB)
-	$(CC) $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/keccak: tests/keccak.c $(mock_LIB)
-	$(CC) $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/merkle: tests/merkle.c $(mock_LIB)
-	$(CC) $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/gio: tests/gio.c tests/data.h $(mock_LIB)
-	$(CC) -Itests $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/rollup: tests/rollup.c tests/data.h $(mock_LIB)
-	$(CC) -Itests $(CFLAGS) -o $@ $^
-
-$(mock_OBJDIR)/progress: tests/progress.c $(mock_LIB)
-	$(CC) -Itests $(CFLAGS) -o $@ $^
-
-test: $(unittests_BINS)
-	$(foreach test,$(unittests_BINS),$(test) &&) true
-
-tests/data.h: tests/create-data.sh
-	$< > $@
-
-#-------------------------------------------------------------------------------
-tools_OBJDIR := build/tools
-tools_BINS := \
-	$(tools_OBJDIR)/funsel
-
-$(tools_OBJDIR)/funsel: tools/funsel.c $(mock_LIB)
-	@mkdir -p $(@D)
-	$(CC) $(CFLAGS) -o $@ $^
-
-tools: $(tools_BINS)
-
-#-------------------------------------------------------------------------------
-LINTER_IGNORE_SOURCES=src/io.c
-LINTER_IGNORE_HEADERS=
-LINTER_SOURCES=$(filter-out $(LINTER_IGNORE_SOURCES),$(strip $(wildcard src/*.c) $(wildcard tests/*.c) $(wildcard tools/*.c)))
-LINTER_HEADERS=$(filter-out $(LINTER_IGNORE_HEADERS),$(strip $(wildcard src/*.h)))
-
-CLANG_TIDY=clang-tidy
-CLANG_TIDY_TARGETS=$(patsubst %.c,%.clang-tidy,$(LINTER_SOURCES))
-
-CLANG_FORMAT=clang-format
-CLANG_FORMAT_FILES:=$(wildcard src/*.c) $(wildcard src/*.h) $(wildcard tests/*.c) $(wildcard tools/*.c)
-CLANG_FORMAT_IGNORE_FILES:=
-CLANG_FORMAT_FILES:=$(strip $(CLANG_FORMAT_FILES))
-CLANG_FORMAT_FILES:=$(filter-out $(CLANG_FORMAT_IGNORE_FILES),$(strip $(CLANG_FORMAT_FILES)))
-
-EMPTY:=
-SPACE:=$(EMPTY) $(EMPTY)
-CLANG_TIDY_HEADER_FILTER=$(CURDIR)/($(subst $(SPACE),|,$(LINTER_HEADERS)))
-
-%.clang-tidy: %.c
-	@$(CLANG_TIDY) --header-filter='$(CLANG_TIDY_HEADER_FILTER)' $< -- $(CFLAGS) 2>/dev/null
-	@$(CC) $(CFLAGS) $< -MM -MT $@ -MF $@.d > /dev/null 2>&1
-	@touch $@
-
-clangd-config:
-	@echo "$(CFLAGS)" | sed -e $$'s/ \{1,\}/\\\n/g' | grep -v "MMD" > compile_flags.txt
-
-format:
-	@$(CLANG_FORMAT) -i $(CLANG_FORMAT_FILES)
-
-check-format:
-	@$(CLANG_FORMAT) -Werror --dry-run $(CLANG_FORMAT_FILES)
-
-lint: $(CLANG_TIDY_TARGETS)
-
-#-------------------------------------------------------------------------------
-
-help:
-	@echo "Targets: (default: '*')"
-	@echo "* all          - Build libcmt and host targets"
-	@echo "  host         - Build mock and tools targets"
-	@echo "  libcmt       - Build the library, tools and examples; to run on the cartesi-machine."
-	@echo "                 (requires the cartesi Linux headers to build)"
-	@echo "  mock         - Build a mocked version of the library, tools and examples; to run on the host system."
-	@echo "  tools        - Build tools on top of the mocked library to run on the host system."
-	@echo "  test         - Build and run tests on top of the mocked library on the host system."
-	@echo "  doc          - Build the documentation and API references as html."
-	@echo "  clean        - remove the binaries and objects."
-	@echo "  install      - Install the library and C headers; on the host system."
-	@echo "                 Use TARGET_DESTDIR and TARGET_PREFIX to customize the installation."
-	@echo "  install-mock - Install the mocked version of the library and C headers; on the host system."
-	@echo "                 Use DESTDIR and PREFIX to customize the installation."
+O=build
+
+DESTDIR ?= _install
+PREFIX ?= /usr
+
+export DESTDIR
+export PREFIX
+
+all: $O
+	@ninja --quiet -C $O #&> /dev/null
+
+$O $O/build.ninja:
+	meson setup \
+		-Dprefix=$(PREFIX) \
+		-Dc_std=gnu2x \
+		-Dwarning_level=3 \
+		-Db_coverage=true \
+		--cross-file=riscv64.ini \
+		$O #&> /dev/null
+
+cov: coverage-html
+coverage-html: test
+test: all
+install uninstall test coverage-html: $O
+	@ninja --quiet -C $O $@
+clean:
+	rm -rf $O
 
 doc/theme:
 	git clone git@github.com:jothepro/doxygen-awesome-css.git $@
@@ -231,18 +48,3 @@ doc/theme:
 
 doc: doc/theme examples
 	doxygen doc/Doxyfile
-
-clean:
-	@rm -rf build
-	@rm -rf src/*.clang-tidy src/*.d
-	@rm -rf tests/*.clang-tidy tests/*.d
-	@rm -rf tools/*.clang-tidy tools/*.d
-	@rm -rf *.bin
-
-distclean: clean
-	@rm -rf doc/html doc/theme
-	@rm -rf compile_flags.txt
-
-OBJ := $(mock_OBJ) $(libcmt_OBJ) $(examples_OBJ) $(tools_OBJ)
-
--include $(OBJ:%.o=%.d)