diff --git a/.circleci/build-image b/.circleci/build-image
deleted file mode 100755
index 42ed6b9..0000000
--- a/.circleci/build-image
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/bin/sh
-
-# Install docker.
-apk add docker-cli
-
-# Run this before set -eux so we don't print credentials to the CI logs.
-if [ -n "$DOCKER_USER" ]; then
-  echo "$DOCKER_PASS" | docker login --username "$DOCKER_USER" --password-stdin
-else
-  DOCKER_USER=
-  DOCKER_PASS=
-fi
-
-set -eux
-
-BUILD="$1"
-IMAGE="$2"
-
-docker pull "$IMAGE" || true
-docker build --cache-from "$IMAGE" --tag "$IMAGE" "$BUILD"
-if [ -n "$DOCKER_USER" ]; then
-  docker push "$IMAGE"
-fi
-
-touch "/tmp/docker-build-$BUILD.done"
diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index de1c63f..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-version: 2.1
-
-workflows:
-  version: 2
-  build:
-    jobs:
-      - compcert
-
-jobs:
-  ##################################################
-  #
-  # :: Static analysis images
-  #
-  ##################################################
-
-  compcert:
-    docker: [{ image: alpine:3.19.0 }]
-
-    steps:
-      - run: apk add git openssh-client
-      - checkout
-      - setup_remote_docker
-      - run: .circleci/build-image compcert toxchat/compcert:latest
diff --git a/.circleci/wait-image b/.circleci/wait-image
deleted file mode 100755
index 5320f10..0000000
--- a/.circleci/wait-image
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/usr/bin/env bash
-
-set -eux
-
-BUILD="$1"
-
-readarray -t WAITS <<<"$(seq 1 10)"
-
-for i in "${WAITS[@]}"; do
-  if [ -f "/tmp/docker-build-$BUILD.done" ]; then
-    break
-  fi
-
-  tail -f "/tmp/docker-build-$BUILD.log" &
-  sleep 300
-done
diff --git a/freebsd/src/setup-vm b/freebsd/src/setup-vm
index 2284340..2b2c699 100755
--- a/freebsd/src/setup-vm
+++ b/freebsd/src/setup-vm
@@ -62,18 +62,19 @@ RUN chsh -s /usr/local/bin/bash root
 
 # Install required toxcore dependencies
 RUN PAGER=cat ASSUME_ALWAYS_YES=YES pkg install \
+  autotools \
+  cmake \
   git \
-  opus \
+  gmake \
   libconfig \
-  libvpx \
+  libsndfile \
   libsodium \
-  gmake \
-  cmake \
+  libvpx \
+  ninja \
+  opus \
   pkgconf \
   portaudio \
-  libsndfile \
-  texinfo \
-  autotools
+  texinfo
 
 # === Compress the VM image ===
 
diff --git a/qtox/build_qtbase_macos.sh b/qtox/build_qtbase_macos.sh
index b1a37b9..39b7239 100755
--- a/qtox/build_qtbase_macos.sh
+++ b/qtox/build_qtbase_macos.sh
@@ -8,7 +8,6 @@ set -euxo pipefail
 readonly SCRIPT_DIR="$(dirname "$(realpath "$0")")"
 
 source "$SCRIPT_DIR/build_utils.sh"
-source "$SCRIPT_DIR/download/version_qt.sh"
 
 parse_arch --dep "qtbase" --supported "macos-arm64 macos-x86_64" "$@"
 
@@ -18,18 +17,25 @@ export CXXFLAGS="-DQT_MESSAGELOGCONTEXT"
 export OBJCXXFLAGS="$CXXFLAGS"
 
 if [ -n "$SANITIZE" ]; then
-  QT_SANITIZE=(-sanitize "$CLANG_SANITIZER")
+  QT_CONFIGURE_FLAGS=(-sanitize "$CLANG_SANITIZER")
   BUILD_TYPE=debug
 else
-  QT_SANITIZE=()
+  QT_CONFIGURE_FLAGS=()
 fi
 
 if [ "$BUILD_TYPE" = "debug" ]; then
-  QT_FORCE_DEBUG_INFO="-force-debug-info"
+  QT_CONFIGURE_FLAGS+=("-force-debug-info")
 else
-  QT_FORCE_DEBUG_INFO="-no-force-debug-info"
+  QT_CONFIGURE_FLAGS+=("-no-force-debug-info")
 fi
 
+if [ "$MACOS_MINIMUM_SUPPORTED_VERSION" != "10.15" ]; then
+  QT_CONFIGURE_FLAGS+=("-no-feature-printsupport")
+fi
+
+# We want -Werror to catch warnings related to macOS version compatibility.
+sed -i '' -e 's/-Wextra/-Wextra -Werror "-Wno-#warnings" -Wno-deprecated-declarations/' cmake/QtCompilerFlags.cmake
+
 mkdir _build && pushd _build
 ../configure \
   --prefix="$QT_PREFIX" \
@@ -37,8 +43,7 @@ mkdir _build && pushd _build
   -static \
   -release \
   -force-asserts \
-  "$QT_FORCE_DEBUG_INFO" \
-  "${QT_SANITIZE[@]}" \
+  "${QT_CONFIGURE_FLAGS[@]}" \
   -qt-doubleconversion \
   -qt-freetype \
   -qt-harfbuzz \
@@ -49,7 +54,6 @@ mkdir _build && pushd _build
   -no-feature-androiddeployqt \
   -no-feature-brotli \
   -no-feature-macdeployqt \
-  -no-feature-printsupport \
   -no-feature-qmake \
   -no-feature-sql \
   -no-feature-dbus \
diff --git a/qtox/build_utils.sh b/qtox/build_utils.sh
index 8d6da8e..da705b6 100644
--- a/qtox/build_utils.sh
+++ b/qtox/build_utils.sh
@@ -8,8 +8,6 @@
 
 set -euxo pipefail
 
-MACOS_MINIMUM_SUPPORTED_VERSION=10.15
-
 usage() {
   # note: this is the usage from the build script's context, so the usage
   # doesn't include --dep argument, since that comes from the build script
@@ -34,6 +32,7 @@ parse_arch() {
   BUILD_TYPE=release
   SANITIZE=
   EXTRA_ARGS=()
+  MACOS_MINIMUM_SUPPORTED_VERSION=12.0
 
   while (($# > 0)); do
     case $1 in
@@ -57,6 +56,10 @@ parse_arch() {
         BUILD_TYPE=$2
         shift 2
         ;;
+      --macos)
+        MACOS_MINIMUM_SUPPORTED_VERSION=$2
+        shift 2
+        ;;
       --sanitize)
         SANITIZE=$2
         shift 2
@@ -83,6 +86,7 @@ parse_arch() {
   done
 
   assert_supported "$SCRIPT_ARCH" "$SUPPORTED"
+  export MACOS_MINIMUM_SUPPORTED_VERSION
 
   if [ "$SCRIPT_ARCH" == "win32" ] || [ "$SCRIPT_ARCH" == "win64" ]; then
     if [ "$SCRIPT_ARCH" == "win32" ]; then
diff --git a/qtox/download/download_qtbase.sh b/qtox/download/download_qtbase.sh
index a0cd588..dfbd202 100755
--- a/qtox/download/download_qtbase.sh
+++ b/qtox/download/download_qtbase.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTBASE_HASH=40b14562ef3bd779bc0e0418ea2ae08fa28235f8ea6e8c0cb3bce1d6ad58dcaf
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/download_qtimageformats.sh b/qtox/download/download_qtimageformats.sh
index eb96cb5..a8c0984 100755
--- a/qtox/download/download_qtimageformats.sh
+++ b/qtox/download/download_qtimageformats.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTIMAGEFORMATS_HASH=138cc2909aa98f5ff7283e36eb3936eb5e625d3ca3b4febae2ca21d8903dd237
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/download_qtremoteobjects.sh b/qtox/download/download_qtremoteobjects.sh
index 938a73d..ade34a8 100755
--- a/qtox/download/download_qtremoteobjects.sh
+++ b/qtox/download/download_qtremoteobjects.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTREMOTEOBJECTS_HASH=7ef2870f05614b71d1cfdd7ac12acef5294abc43da244a6e9e411f21208f59f8
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/download_qtsvg.sh b/qtox/download/download_qtsvg.sh
index 13410dd..efeb558 100755
--- a/qtox/download/download_qtsvg.sh
+++ b/qtox/download/download_qtsvg.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTSVG_HASH=3d0de73596e36b2daa7c48d77c4426bb091752856912fba720215f756c560dd0
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/download_qttools.sh b/qtox/download/download_qttools.sh
index 709bc80..4fd664b 100755
--- a/qtox/download/download_qttools.sh
+++ b/qtox/download/download_qttools.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTTOOLS_HASH=9d43d409be08b8681a0155a9c65114b69c9a3fc11aef6487bb7fdc5b283c432d
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/download_qtwayland.sh b/qtox/download/download_qtwayland.sh
index 7c15529..28f6f30 100755
--- a/qtox/download/download_qtwayland.sh
+++ b/qtox/download/download_qtwayland.sh
@@ -6,8 +6,6 @@
 
 set -euo pipefail
 
-QTWAYLAND_HASH=2226fbde4e2ddd12f8bf4b239c8f38fd706a54e789e63467dfddc77129eca203
-
 source "$(dirname "$(realpath "$0")")/common.sh"
 source "$(dirname "$(realpath "$0")")/version_qt.sh"
 
diff --git a/qtox/download/version_qt.sh b/qtox/download/version_qt.sh
index 7d91c32..370e327 100644
--- a/qtox/download/version_qt.sh
+++ b/qtox/download/version_qt.sh
@@ -3,7 +3,33 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Copyright © 2024-2025 The TokTok team
 
-QT_VERSION="6.8.1"
+# shellcheck disable=SC2034
+
 QT_MAJOR=6
-QT_MINOR=8
-QT_PATCH=1
+
+if [ "$MACOS_MINIMUM_SUPPORTED_VERSION" = "10.15" ]; then
+  QT_MINOR=6
+  QT_PATCH=3
+
+  QTBASE_HASH=0493fd0b380c4edf8872f011a7f26d245aa4cdd75b349904ef340a22dedf7462
+  QTIMAGEFORMATS_HASH="3ca5ea60176603ce6ffc1bff59a4dcea139375233ce8e5e86c38f4e84c44627c"
+  QTREMOTEOBJECTS_HASH="???"
+  QTSVG_HASH=4acb1e576eca55e955cf2b0d15c914a200df290e737accd7c1901fa1e33a25c7
+  QTTOOLS_HASH=aa6d4c822d8cb74066ef30ab42283ac24e5cc702f33e6d78a9ebef5b0df91bc0
+  QTWAYLAND_HASH="???"
+elif [ "$MACOS_MINIMUM_SUPPORTED_VERSION" = "12.0" ]; then
+  QT_MINOR=8
+  QT_PATCH=1
+
+  QTBASE_HASH=40b14562ef3bd779bc0e0418ea2ae08fa28235f8ea6e8c0cb3bce1d6ad58dcaf
+  QTIMAGEFORMATS_HASH=138cc2909aa98f5ff7283e36eb3936eb5e625d3ca3b4febae2ca21d8903dd237
+  QTREMOTEOBJECTS_HASH=7ef2870f05614b71d1cfdd7ac12acef5294abc43da244a6e9e411f21208f59f8
+  QTSVG_HASH=3d0de73596e36b2daa7c48d77c4426bb091752856912fba720215f756c560dd0
+  QTTOOLS_HASH=9d43d409be08b8681a0155a9c65114b69c9a3fc11aef6487bb7fdc5b283c432d
+  QTWAYLAND_HASH=2226fbde4e2ddd12f8bf4b239c8f38fd706a54e789e63467dfddc77129eca203
+else
+  echo "Unsupported macOS version: $MACOS_MINIMUM_SUPPORTED_VERSION"
+  exit 1
+fi
+
+QT_VERSION="$QT_MAJOR.$QT_MINOR.$QT_PATCH"