diff --git a/.travis.yml b/.travis.yml
index d662e6d..0b78b99 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ env:
     - DISTRIB_ID=ubuntu VARIANT=coverage     MARCH=x86_64   CHECK_TARGET=check
     - DISTRIB_ID=ubuntu VARIANT=release      MARCH=x86_64   CHECK_TARGET=memcheck
     - DISTRIB_ID=ubuntu VARIANT=debug        MARCH=arm32v7  CHECK_TARGET=check
-    - DISTRIB_ID=ubuntu VARIANT=min_size_rel MARCH=arm32v7  CHECK_TARGET=check
+    - DISTRIB_ID=ubuntu VARIANT=minsize      MARCH=arm32v7  CHECK_TARGET=check
     - DISTRIB_ID=alpine VARIANT=debug        MARCH=x86_64   CHECK_TARGET=check
 before_script:
 - make -j4 DISTRIB_ID=$DISTRIB_ID VARIANT=$VARIANT MARCH=$MARCH
diff --git a/Makefile b/Makefile
index 2d6f545..5883d6c 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,9 @@ default: all
 # Overridable project defaults
 
 DOBUILD_DOCKERFILE ?= $(PROJECTDIR)/build/%MARCH%-%DISTRIB_ID%-%ID%.dockerfile
+DOBUILD_EXTDIR ?= $(PROJECTDIR)/build/dobuild-extensions
 DOBUILD_PROJECTDIR ?= $(patsubst %/,%,$(dir $(MAKEFILE)))
+DOBUILD_GENERIC_ADAPTER ?= meson
 
 DOBUILDDIR ?= $(PROJECTDIR)/build/dobuild
 PROJECTDIR = $(DOBUILD_PROJECTDIR)
@@ -39,30 +41,12 @@ FETCH_TARGETS += $(FETCHDIR)/dumb-init-$(DUMB_INIT_VERSION).tar.gz
 $(FETCHDIR)/dumb-init-$(DUMB_INIT_VERSION).tar.gz: URL := https://github.com/Yelp/dumb-init/archive/v${DUMB_INIT_VERSION}.tar.gz
 $(SKIP_MD5SUM)$(FETCHDIR)/dumb-init-$(DUMB_INIT_VERSION).tar.gz: MD5 := 6166084b05772cdcf615a762c6f3b32e
 
-GTEST_VERSION ?= 1.10.0
-IMAGE_BUILDARGS += GTEST_VERSION=$(GTEST_VERSION)
-FETCH_TARGETS += $(FETCHDIR)/googletest-release-$(GTEST_VERSION).tar.gz
-$(FETCHDIR)/googletest-release-$(GTEST_VERSION).tar.gz: URL := https://github.com/google/googletest/archive/release-$(GTEST_VERSION).tar.gz
-$(SKIP_MD5SUM)$(FETCHDIR)/googletest-release-$(GTEST_VERSION).tar.gz: MD5 := ecd1fa65e7de707cd5c00bdac56022cd
-
 FUSE_VERSION ?= 3.9.1
 IMAGE_BUILDARGS += FUSE_VERSION=$(FUSE_VERSION)
 FETCH_TARGETS += $(FETCHDIR)/libfuse-fuse-$(FUSE_VERSION).tar.gz
 $(FETCHDIR)/libfuse-fuse-$(FUSE_VERSION).tar.gz: URL := https://github.com/libfuse/libfuse/archive/fuse-$(FUSE_VERSION).tar.gz
 $(SKIP_MD5SUM)$(FETCHDIR)/libfuse-fuse-$(FUSE_VERSION).tar.gz: MD5 := 5f7c1062def710d8b60343524a18cc82
 
-WEBSOCKETS_VERSION ?= 4.0.10
-IMAGE_BUILDARGS += WEBSOCKETS_VERSION=$(WEBSOCKETS_VERSION)
-FETCH_TARGETS += $(FETCHDIR)/libwebsockets-$(WEBSOCKETS_VERSION).tar.gz
-$(FETCHDIR)/libwebsockets-$(WEBSOCKETS_VERSION).tar.gz: URL := https://github.com/warmcat/libwebsockets/archive/v$(WEBSOCKETS_VERSION).tar.gz
-$(SKIP_MD5SUM)$(FETCHDIR)/libwebsockets-$(WEBSOCKETS_VERSION).tar.gz: MD5 := a1ce5a279fd06b2ce132c02c292df7aa
-
-JANSSON_VERSION ?= 2.12
-IMAGE_BUILDARGS += JANSSON_VERSION=$(JANSSON_VERSION)
-FETCH_TARGETS += $(FETCHDIR)/jansson-$(JANSSON_VERSION).tar.gz
-$(FETCHDIR)/jansson-$(JANSSON_VERSION).tar.gz: URL := https://github.com/akheron/jansson/archive/v$(JANSSON_VERSION).tar.gz
-$(SKIP_MD5SUM)$(FETCHDIR)/jansson-$(JANSSON_VERSION).tar.gz: MD5 := c4b106528d5ffb521178565de1ba950d
-
 QEMU_VERSION ?= v4.1.0-1
 IMAGE_BUILDARGS += QEMU_VERSION_=$(QEMU_VERSION)
 FETCH_TARGETS += $(FETCHDIR)/qemu-arm-static-$(QEMU_VERSION)
@@ -72,7 +56,7 @@ $(SKIP_MD5SUM)$(FETCHDIR)/qemu-arm-static-$(QEMU_VERSION): MD5 := e508e6e4dd7f3a
 #######################################################################################################################
 # Architecture-specific rule target configuration
 
-CMAKE_TARGETS += $(call target_properties_combine,\
+GENERIC_TARGETS += $(call target_properties_combine,\
     ,\
     x86_64 arm32v7,\
     ubuntu@bionic alpine@3.9,\
@@ -80,9 +64,9 @@ CMAKE_TARGETS += $(call target_properties_combine,\
     ,\
     builder,\
     ,\
-    debug release coverage min_size_rel \
+    debug release coverage minsize \
   )
-DOCKER_TARGETS += $(CMAKE_TARGETS)
+DOCKER_TARGETS += $(GENERIC_TARGETS)
 
 #######################################################################################################################
 # Common rule target configuration
@@ -114,7 +98,6 @@ MAKEFILE_DEPS += cp
 #######################################################################################################################
 # Rules
 
-include $(DOBUILDDIR)/cmake.mk
 include $(DOBUILDDIR)/docker.mk
 include $(DOBUILDDIR)/standardrules.mk
 
diff --git a/build/arm32v7-alpine-builder.dockerfile b/build/arm32v7-alpine-builder.dockerfile
index 6c275fb..392553b 100644
--- a/build/arm32v7-alpine-builder.dockerfile
+++ b/build/arm32v7-alpine-builder.dockerfile
@@ -14,14 +14,21 @@ RUN set -x \
        gcc \
        g++ \
        make \
+       python3 \
+       py3-pip \
+       py3-setuptools \
+       py3-cryptography \
        cmake \
        ninja \
        pkgconf \
-       rsync \
+       tar \
        gdb \
-       valgrind 
-#       util-linux \
-#       util-linux-dev
+       git \
+       ca-certificates \
+       openssl \
+       openssl-dev \
+       linux-headers \
+   && pip3 install meson
 
 COPY src /usr/local/src
 
@@ -44,60 +51,18 @@ RUN set -x \
   && rm -rf "$builddir" \
   && apk del .build-deps
 
-ARG GTEST_VERSION=1.10.0
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/googletest-release-$GTEST_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ARG FUSE_VERSION=3.9.1
 
 RUN set -x \
-  && builddeps="linux-headers eudev-dev python3 py3-pip py3-setuptools py3-cryptography" \
+  && builddeps="eudev-dev" \
   && apk add --no-cache --virtual .build-deps $builddeps \
-  && pip3 install meson \
   && builddir="/tmp/out" \
   && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && meson "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
-  && meson configure -Dexamples=false \
-  && ninja \
-  && ninja install \
-  && pip3 uninstall -y meson \
+  && meson -Dexamples=false "$builddir" "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
+  && ninja "$PARALLELMFLAGS" -C "$builddir" install \
   && rm -rf "$builddir" \
   && apk del .build-deps
 
-ARG WEBSOCKETS_VERSION=4.0.10
-
-RUN set -x \
-  && builddeps="linux-headers" \
-  && apk add --no-cache --virtual .build-deps $builddeps \
-  && apk add --no-cache \
-       ca-certificates \
-       openssl \
-       openssl-dev \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/libwebsockets-$WEBSOCKETS_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir" \
-  && apk del .build-deps
-
-ARG JANSSON_VERSION=2.12
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake -DJANSSON_BUILD_DOCS=OFF "/usr/local/src/jansson-$JANSSON_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"
 ENV PKG_CONFIG_PATH=/usr/local/lib32/pkgconfig
 
diff --git a/build/arm32v7-ubuntu-builder.dockerfile b/build/arm32v7-ubuntu-builder.dockerfile
index 6c7db45..3bf59d7 100644
--- a/build/arm32v7-ubuntu-builder.dockerfile
+++ b/build/arm32v7-ubuntu-builder.dockerfile
@@ -12,13 +12,21 @@ RUN set -x \
   && apt upgrade -y \
   && apt install --yes --no-install-recommends \
        build-essential \
+       python3 \
+       python3-pip \
+       python3-setuptools \
+       python3-wheel \
        cmake \
        ninja-build \
        pkg-config \
-       rsync \
        gdb \
        gdbserver \
-       lcov 
+       lcov \
+       git \
+       ca-certificates \
+       openssl \
+       libssl-dev \
+   && pip3 install --system meson
 
 COPY src /usr/local/src
 
@@ -41,57 +49,18 @@ RUN set -x \
   && rm -rf "$builddir" \
   && apt purge -y $builddeps
 
-ARG GTEST_VERSION=1.10.0
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/googletest-release-$GTEST_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ARG FUSE_VERSION=3.9.1
 
 RUN set -x \
-  && builddeps="udev gettext python3 python3-pip python3-setuptools python3-wheel" \
+  && builddeps="udev gettext" \
   && apt install --yes --no-install-recommends $builddeps \
-  && pip3 install --system meson \
   && builddir="/tmp/out" \
   && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && meson "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
-  && meson configure -Dexamples=false \
-  && ninja \
-  && ninja install \
-  && pip3 uninstall -y meson \
+  && meson -Dexamples=false "$builddir" "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
+  && ninja "$PARALLELMFLAGS" -C "$builddir" install \
   && rm -rf "$builddir" \
   && apt purge -y $builddeps
 
-ARG WEBSOCKETS_VERSION=4.0.10
-
-RUN set -x \
-  && apt install --yes --no-install-recommends \
-       ca-certificates \
-       openssl \
-       libssl-dev \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/libwebsockets-$WEBSOCKETS_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
-ARG JANSSON_VERSION=2.12
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake -DJANSSON_BUILD_DOCS=OFF "/usr/local/src/jansson-$JANSSON_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"
 
 ARG USERID=1000
diff --git a/build/dobuild-extensions/meson/assemble b/build/dobuild-extensions/meson/assemble
new file mode 100755
index 0000000..c3b64be
--- /dev/null
+++ b/build/dobuild-extensions/meson/assemble
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+exec ninja_adapter "$@"
+
diff --git a/build/dobuild-extensions/meson/check b/build/dobuild-extensions/meson/check
new file mode 100755
index 0000000..c2bb1da
--- /dev/null
+++ b/build/dobuild-extensions/meson/check
@@ -0,0 +1,4 @@
+#!/bin/sh -e
+
+exec ninja_adapter test "$@"
+
diff --git a/build/dobuild-extensions/meson/check-memcheck b/build/dobuild-extensions/meson/check-memcheck
new file mode 100755
index 0000000..d8313cb
--- /dev/null
+++ b/build/dobuild-extensions/meson/check-memcheck
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+. DoBuildFiles/generic.properties
+
+{ [ -z "$BUILDVERBOSE" ] && [ -z "$TESTVERBOSE" ]; } || set -- -v "$@"
+[ -z "$VERBOSE" ] || set -x
+
+exec meson test -C "${PWD}/meson" --num-processes "$NPROC" --print-errorlogs --wrap 'valgrind --error-exitcode=1' "$@"
+
diff --git a/build/dobuild-extensions/meson/ninja_adapter b/build/dobuild-extensions/meson/ninja_adapter
new file mode 100755
index 0000000..a5db137
--- /dev/null
+++ b/build/dobuild-extensions/meson/ninja_adapter
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+. DoBuildFiles/generic.properties
+
+set -- "$@" -C "${PWD}/meson"
+{ [ -z "$BUILDVERBOSE" ] && [ -z "$TESTVERBOSE" ]; } || set -- -v "$@"
+[ -z "$VERBOSE" ] || set -x
+
+exec ninja -j"$NPROC" "$@"
+
diff --git a/build/dobuild-extensions/meson/package-install b/build/dobuild-extensions/meson/package-install
new file mode 100755
index 0000000..5e6d21f
--- /dev/null
+++ b/build/dobuild-extensions/meson/package-install
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+export DESTDIR="$1"
+
+exec ninja_adapter install
diff --git a/build/dobuild-extensions/meson/prepare b/build/dobuild-extensions/meson/prepare
new file mode 100755
index 0000000..299da54
--- /dev/null
+++ b/build/dobuild-extensions/meson/prepare
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+. DoBuildFiles/generic.properties
+
+rm -rf meson
+
+BUILDTYPE="$VARIANT"
+COVERAGE=false
+
+if [ "$VARIANT" = "coverage" ]; then
+  BUILDTYPE="debug"
+  COVERAGE=true
+fi
+
+[ -z "$VERBOSE" ] || set -x
+
+exec meson setup --buildtype "$BUILDTYPE" "-Db_coverage=$COVERAGE" "${PWD}/meson" "$PROJECTDIR" "$@"
+
diff --git a/build/dobuild/defaults.mk b/build/dobuild/defaults.mk
index 37447c7..6c01ce7 100644
--- a/build/dobuild/defaults.mk
+++ b/build/dobuild/defaults.mk
@@ -552,7 +552,7 @@ HOST_CONTAINER = $(call memorize,HOST_CONTAINER,$(DOBUILD_HOSTCONTAINER))
 SOURCE_DATE_EPOCH ?= $(call memorize,SOURCE_DATE_EPOCH,$(shell $(DOBUILDDIR)/bin/get_source_date_epoch $(TOPDIR)))
 BUILDTIME = $(call memorize,BUILDTIME,$(shell date -u -d '@$(SOURCE_DATE_EPOCH)' --rfc-3339 ns 2>/dev/null))
 
-JOBSLOTS_DEFAULT = $(if $(findstring --jobserver-,$(make_cmdline)),2,$(shell nproc 2>/dev/null || echo '2'))
+JOBSLOTS_DEFAULT = $(if $(findstring --jobserver-,$(make_cmdline)),2,$(nproc))
 JOBSLOTS = $(call memorize,JOBSLOTS,$(or $(DOBUILD_JOBSLOTS),$(JOBSLOTS_DEFAULT)))
 
 SKIP_MD5SUM = $(call memorize,SKIP_MD5SUM,$(DOBUILD_SKIPMD5SUM))
@@ -590,6 +590,7 @@ $(VERBOSE)SILENT := @
 make_pid = $(call memorize,make_pid,$(shell echo "$$PPID"))
 make_cmdline = $(call memorize,make_cmdline,$(shell set -- $$(ps T 2>/dev/null | sed -n -e 's!^\s*$(make_pid)\s\+.*\($(call escape,$(MAKE),!)\s\+.*\)!\1!p') && echo "$$@"))
 
+nproc = $(call memorize,nproc,$(shell nproc || echo '1'))
 machine = $(call memorize,machine,$(shell uname -m 2>/dev/null))
 
 make_version = $(MAKE_VERSION)
diff --git a/build/dobuild/docker.mk b/build/dobuild/docker.mk
index 5512492..6ae1b89 100644
--- a/build/dobuild/docker.mk
+++ b/build/dobuild/docker.mk
@@ -344,7 +344,7 @@ ifeq ($(docker_portable_workspace),)
   container_destdir = $(abspath $(DESTDIR))
 endif
 
-container_cpus = $(call min,$(INTERNPARALLEL) $(JOBSLOTS_DEFAULT))
+container_cpus = $(call min,$(INTERNPARALLEL) $(nproc))
 container_cpuperiod = 100000
 container_quota = $(call bc,($(container_cpus)*$(container_cpuperiod)))
 container_nproc = $(INTERNPARALLEL)
diff --git a/build/dobuild/generic.mk b/build/dobuild/generic.mk
index cc7b912..d1d7aa8 100644
--- a/build/dobuild/generic.mk
+++ b/build/dobuild/generic.mk
@@ -105,7 +105,7 @@ generic_default_prerequisites = \
 
 # retrieves the target generic default extension directory
 # $(call generic_default_extdir,target-name)
-generic_default_extdir = $(addprefix $(PROJECTDIR)/dobuild-extensions/,$(cache.$1.adapter))
+generic_default_extdir = $(addprefix $(addsuffix /,$(EXTDIR)),$(cache.$1.adapter))
 
 # creates a generic run rule command
 # $(call generic_run_cmd,target-name,command[,args],alternative-command[,output-command])
diff --git a/build/x86_64-alpine-builder.dockerfile b/build/x86_64-alpine-builder.dockerfile
index f049285..1b07592 100644
--- a/build/x86_64-alpine-builder.dockerfile
+++ b/build/x86_64-alpine-builder.dockerfile
@@ -10,14 +10,22 @@ RUN set -x \
        gcc \
        g++ \
        make \
+       python3 \
+       py3-pip \
+       py3-setuptools \
+       py3-cryptography \
        cmake \
        ninja \
        pkgconf \
-       rsync \
+       tar \
        gdb \
-       valgrind 
-#       util-linux \
-#       util-linux-dev
+       valgrind \
+       git \
+       ca-certificates \
+       openssl \
+       openssl-dev \
+       linux-headers \
+   && pip3 install meson
 
 COPY src /usr/local/src
 
@@ -40,60 +48,18 @@ RUN set -x \
   && rm -rf "$builddir" \
   && apk del .build-deps
 
-ARG GTEST_VERSION=1.10.0
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/googletest-release-$GTEST_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ARG FUSE_VERSION=3.9.1
 
 RUN set -x \
-  && builddeps="linux-headers eudev-dev python3 py3-pip py3-setuptools py3-cryptography" \
+  && builddeps="eudev-dev" \
   && apk add --no-cache --virtual .build-deps $builddeps \
-  && pip3 install meson \
   && builddir="/tmp/out" \
   && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && meson "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
-  && meson configure -Dexamples=false \
-  && ninja \
-  && ninja install \
-  && pip3 uninstall -y meson \
+  && meson -Dexamples=false "$builddir" "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
+  && ninja "$PARALLELMFLAGS" -C "$builddir" install \
   && rm -rf "$builddir" \
   && apk del .build-deps
 
-ARG WEBSOCKETS_VERSION=4.0.10
-
-RUN set -x \
-  && builddeps="linux-headers" \
-  && apk add --no-cache --virtual .build-deps $builddeps \
-  && apk add --no-cache \
-       ca-certificates \
-       openssl \
-       openssl-dev \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/libwebsockets-$WEBSOCKETS_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir" \
-  && apk del .build-deps
-
-ARG JANSSON_VERSION=2.12
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake -DJANSSON_BUILD_DOCS=OFF "/usr/local/src/jansson-$JANSSON_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"
 ENV PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig
 
diff --git a/build/x86_64-ubuntu-builder.dockerfile b/build/x86_64-ubuntu-builder.dockerfile
index a21059e..060f6cb 100644
--- a/build/x86_64-ubuntu-builder.dockerfile
+++ b/build/x86_64-ubuntu-builder.dockerfile
@@ -8,14 +8,22 @@ RUN set -x \
   && apt upgrade -y \
   && apt install --yes --no-install-recommends \
        build-essential \
+       python3 \
+       python3-pip \
+       python3-setuptools \
+       python3-wheel \
        cmake \
        ninja-build \
        pkg-config \
-       rsync \
        gdb \
        gdbserver \
        valgrind \
-       lcov 
+       lcov \
+       git \
+       ca-certificates \
+       openssl \
+       libssl-dev \
+   && pip3 install --system meson
 
 COPY src /usr/local/src
 
@@ -38,57 +46,18 @@ RUN set -x \
   && rm -rf "$builddir" \
   && apt purge -y $builddeps
 
-ARG GTEST_VERSION=1.10.0
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/googletest-release-$GTEST_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ARG FUSE_VERSION=3.9.1
 
 RUN set -x \
-  && builddeps="udev gettext python3 python3-pip python3-setuptools python3-wheel" \
+  && builddeps="udev gettext" \
   && apt install --yes --no-install-recommends $builddeps \
-  && pip3 install --system meson \
   && builddir="/tmp/out" \
   && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && meson "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
-  && meson configure -Dexamples=false \
-  && ninja \
-  && ninja install \
-  && pip3 uninstall -y meson \
+  && meson -Dexamples=false "$builddir" "/usr/local/src/libfuse-fuse-$FUSE_VERSION" \
+  && ninja "$PARALLELMFLAGS" -C "$builddir" install \
   && rm -rf "$builddir" \
   && apt purge -y $builddeps
 
-ARG WEBSOCKETS_VERSION=4.0.10
-
-RUN set -x \
-  && apt install --yes --no-install-recommends \
-       ca-certificates \
-       openssl \
-       libssl-dev \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake "/usr/local/src/libwebsockets-$WEBSOCKETS_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
-ARG JANSSON_VERSION=2.12
-
-RUN set -x \
-  && builddir="/tmp/out" \
-  && mkdir -p "$builddir" \
-  && cd "$builddir" \
-  && cmake -DJANSSON_BUILD_DOCS=OFF "/usr/local/src/jansson-$JANSSON_VERSION" \
-  && make "$PARALLELMFLAGS" install \
-  && rm -rf "$builddir"
-
 ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"
 
 ARG USERID=1000