diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index 7b411e2c4..0ccdcb14a 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -1,247 +1,248 @@
 PACKAGE=qt
 $(package)_version=5.9.8
 $(package)_download_path=https://download.qt.io/official_releases/qt/5.9/$($(package)_version)/submodules
 $(package)_suffix=opensource-src-$($(package)_version).tar.xz
 $(package)_file_name=qtbase-$($(package)_suffix)
 $(package)_sha256_hash=9b9dec1f67df1f94bce2955c5604de992d529dde72050239154c56352da0907d
 $(package)_dependencies=openssl zlib
 $(package)_linux_dependencies=freetype fontconfig libxcb
 $(package)_qt_libs=corelib network widgets gui plugins testlib
 $(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch
 $(package)_patches+= fix_rcc_determinism.patch xkb-default.patch no-xlib.patch dont_hardcode_pwd.patch
 $(package)_patches+= drop_lrelease_dependency.patch
-$(package)_patches+= fix_mingw_cross_compile.patch
+$(package)_patches+= fix_mingw_cross_compile.patch fix_qpainter_non_determinism.patch
 $(package)_patches+= fix_numeric_limits_compile_error.patch
 
 # Update OSX_QT_TRANSLATIONS when this is updated
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=fb5a47799754af73d3bf501fe513342cfe2fc37f64e80df5533f6110e804220c
 
 $(package)_qttools_file_name=qttools-$($(package)_suffix)
 $(package)_qttools_sha256_hash=a97556eb7b2f30252cdd8a598c396cfce2b2f79d2bae883af6d3b26a2cdcc63c
 
 $(package)_extra_sources  = $($(package)_qttranslations_file_name)
 $(package)_extra_sources += $($(package)_qttools_file_name)
 
 define $(package)_set_vars
 $(package)_config_opts_release = -release
 $(package)_config_opts_release += -silent
 $(package)_config_opts_debug = -debug
 $(package)_config_opts += -bindir $(build_prefix)/bin
 $(package)_config_opts += -c++std c++1z
 $(package)_config_opts += -confirm-license
 $(package)_config_opts += -hostprefix $(build_prefix)
 $(package)_config_opts += -no-compile-examples
 $(package)_config_opts += -no-cups
 $(package)_config_opts += -no-egl
 $(package)_config_opts += -no-eglfs
 $(package)_config_opts += -no-freetype
 $(package)_config_opts += -no-gif
 $(package)_config_opts += -no-glib
 $(package)_config_opts += -no-icu
 $(package)_config_opts += -no-ico
 $(package)_config_opts += -no-iconv
 $(package)_config_opts += -no-kms
 $(package)_config_opts += -no-linuxfb
 $(package)_config_opts += -no-libjpeg
 $(package)_config_opts += -no-libudev
 $(package)_config_opts += -no-mtdev
 $(package)_config_opts += -no-opengl
 $(package)_config_opts += -no-openvg
 $(package)_config_opts += -no-reduce-relocations
 $(package)_config_opts += -no-qml-debug
 $(package)_config_opts += -no-sql-db2
 $(package)_config_opts += -no-sql-ibase
 $(package)_config_opts += -no-sql-oci
 $(package)_config_opts += -no-sql-tds
 $(package)_config_opts += -no-sql-mysql
 $(package)_config_opts += -no-sql-odbc
 $(package)_config_opts += -no-sql-psql
 $(package)_config_opts += -no-sql-sqlite
 $(package)_config_opts += -no-sql-sqlite2
 $(package)_config_opts += -no-use-gold-linker
 $(package)_config_opts += -no-xinput2
 $(package)_config_opts += -nomake examples
 $(package)_config_opts += -nomake tests
 $(package)_config_opts += -opensource
 $(package)_config_opts += -openssl-linked
 $(package)_config_opts += -optimized-qmake
 $(package)_config_opts += -pch
 $(package)_config_opts += -pkg-config
 $(package)_config_opts += -prefix $(host_prefix)
 $(package)_config_opts += -qt-libpng
 $(package)_config_opts += -qt-pcre
 $(package)_config_opts += -qt-harfbuzz
 $(package)_config_opts += -system-zlib
 $(package)_config_opts += -static
 $(package)_config_opts += -v
 $(package)_config_opts += -no-feature-bearermanagement
 $(package)_config_opts += -no-feature-colordialog
 $(package)_config_opts += -no-feature-commandlineparser
 $(package)_config_opts += -no-feature-concurrent
 $(package)_config_opts += -no-feature-dial
 $(package)_config_opts += -no-feature-fontcombobox
 $(package)_config_opts += -no-feature-ftp
 $(package)_config_opts += -no-feature-image_heuristic_mask
 $(package)_config_opts += -no-feature-keysequenceedit
 $(package)_config_opts += -no-feature-lcdnumber
 $(package)_config_opts += -no-feature-pdf
 $(package)_config_opts += -no-feature-printdialog
 $(package)_config_opts += -no-feature-printer
 $(package)_config_opts += -no-feature-printpreviewdialog
 $(package)_config_opts += -no-feature-printpreviewwidget
 $(package)_config_opts += -no-feature-regularexpression
 $(package)_config_opts += -no-feature-sessionmanager
 $(package)_config_opts += -no-feature-sql
 $(package)_config_opts += -no-feature-statemachine
 $(package)_config_opts += -no-feature-syntaxhighlighter
 $(package)_config_opts += -no-feature-textbrowser
 $(package)_config_opts += -no-feature-textodfwriter
 $(package)_config_opts += -no-feature-topleveldomain
 $(package)_config_opts += -no-feature-udpsocket
 $(package)_config_opts += -no-feature-undocommand
 $(package)_config_opts += -no-feature-undogroup
 $(package)_config_opts += -no-feature-undostack
 $(package)_config_opts += -no-feature-undoview
 $(package)_config_opts += -no-feature-vnc
 $(package)_config_opts += -no-feature-wizard
 $(package)_config_opts += -no-feature-xml
 
 $(package)_config_opts_darwin = -no-dbus
 
 ifneq ($(build_os),darwin)
 $(package)_config_opts_darwin += -xplatform macx-clang-linux
 $(package)_config_opts_darwin += -device-option MAC_SDK_PATH=$(OSX_SDK)
 $(package)_config_opts_darwin += -device-option MAC_SDK_VERSION=$(OSX_SDK_VERSION)
 $(package)_config_opts_darwin += -device-option CROSS_COMPILE="$(host)-"
 $(package)_config_opts_darwin += -device-option MAC_MIN_VERSION=$(OSX_MIN_VERSION)
 $(package)_config_opts_darwin += -device-option MAC_TARGET=$(host)
 $(package)_config_opts_darwin += -device-option XCODE_VERSION=$(XCODE_VERSION)
 endif
 
 $(package)_config_opts_linux  = -qt-xkbcommon-x11
 $(package)_config_opts_linux += -qt-xcb
 $(package)_config_opts_linux += -no-xcb-xlib
 $(package)_config_opts_linux += -no-feature-xlib
 $(package)_config_opts_linux += -system-freetype
 $(package)_config_opts_linux += -fontconfig
 $(package)_config_opts_linux += -dbus-runtime
 $(package)_config_opts_arm_linux += -platform linux-g++ -xplatform bitcoin-linux-g++
 $(package)_config_opts_i686_linux  = -xplatform linux-g++-32
 $(package)_config_opts_x86_64_linux = -xplatform linux-g++-64
 $(package)_config_opts_aarch64_linux = -xplatform linux-aarch64-gnu-g++
 $(package)_config_opts_mingw32 = -no-dbus
 $(package)_config_opts_mingw32 += -xplatform win32-g++
 $(package)_config_opts_mingw32 += -device-option CROSS_COMPILE="$(host)-"
 $(package)_build_env  = QT_RCC_TEST=1
 $(package)_build_env += QT_RCC_SOURCE_DATE_OVERRIDE=1
 endef
 
 define $(package)_fetch_cmds
 $(call fetch_file,$(package),$($(package)_download_path),$($(package)_download_file),$($(package)_file_name),$($(package)_sha256_hash)) && \
 $(call fetch_file,$(package),$($(package)_download_path),$($(package)_qttranslations_file_name),$($(package)_qttranslations_file_name),$($(package)_qttranslations_sha256_hash)) && \
 $(call fetch_file,$(package),$($(package)_download_path),$($(package)_qttools_file_name),$($(package)_qttools_file_name),$($(package)_qttools_sha256_hash))
 endef
 
 define $(package)_extract_cmds
   mkdir -p $($(package)_extract_dir) && \
   echo "$($(package)_sha256_hash)  $($(package)_source)" > $($(package)_extract_dir)/.$($(package)_file_name).hash && \
   echo "$($(package)_qttranslations_sha256_hash)  $($(package)_source_dir)/$($(package)_qttranslations_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
   echo "$($(package)_qttools_sha256_hash)  $($(package)_source_dir)/$($(package)_qttools_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
   $(build_SHA256SUM) -c $($(package)_extract_dir)/.$($(package)_file_name).hash && \
   mkdir qtbase && \
   tar --no-same-owner --strip-components=1 -xf $($(package)_source) -C qtbase && \
   mkdir qttranslations && \
   tar --no-same-owner --strip-components=1 -xf $($(package)_source_dir)/$($(package)_qttranslations_file_name) -C qttranslations && \
   mkdir qttools && \
   tar --no-same-owner --strip-components=1 -xf $($(package)_source_dir)/$($(package)_qttools_file_name) -C qttools
 endef
 
 # Preprocessing steps work as follows:
 #
 # 1. Apply our patches to the extracted source. See each patch for more info.
 #
 # 2. Point to lrelease in qttools/bin/lrelease; otherwise Qt will look for it in
 # $(host)/native/bin/lrelease and not find it.
 #
 # 3. Create a macOS-Clang-Linux mkspec using our mac-qmake.conf.
 #
 # 4. After making a copy of the mkspec for the linux-arm-gnueabi host, named
 # bitcoin-linux-g++, replace instances of linux-arm-gnueabi with $(host). This
 # way we can generically support hosts like riscv64-linux-gnu, which Qt doesn't
 # ship a mkspec for. See it's usage in config_opts_* above.
 #
 # 5. Put our C, CXX and LD FLAGS into gcc-base.conf. Only used for non-host builds.
 #
 # 6. Do similar for the win32-g++ mkspec.
 #
 # 7. In clang.conf, swap out clang & clang++, for our compiler + flags. See #17466.
 #
 # 8. Adjust a regex in toolchain.prf, to accomodate Guix's usage of
 # CROSS_LIBRARY_PATH. See core#15277.
 define $(package)_preprocess_cmds
   patch -p1 -i $($(package)_patch_dir)/fix_numeric_limits_compile_error.patch && \
   patch -p1 -i $($(package)_patch_dir)/drop_lrelease_dependency.patch && \
   patch -p1 -i $($(package)_patch_dir)/dont_hardcode_pwd.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_qt_pkgconfig.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_configure_mac.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_no_printer.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_rcc_determinism.patch && \
   patch -p1 -i $($(package)_patch_dir)/xkb-default.patch && \
   patch -p1 -i $($(package)_patch_dir)/no-xlib.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_mingw_cross_compile.patch && \
+  patch -p1 -i $($(package)_patch_dir)/fix_qpainter_non_determinism.patch && \
   sed -i.old "s|updateqm.commands = \$$$$\$$$$LRELEASE|updateqm.commands = $($(package)_extract_dir)/qttools/bin/lrelease|" qttranslations/translations/translations.pro && \
   mkdir -p qtbase/mkspecs/macx-clang-linux &&\
   cp -f qtbase/mkspecs/macx-clang/qplatformdefs.h qtbase/mkspecs/macx-clang-linux/ &&\
   cp -f $($(package)_patch_dir)/mac-qmake.conf qtbase/mkspecs/macx-clang-linux/qmake.conf && \
   cp -r qtbase/mkspecs/linux-arm-gnueabi-g++ qtbase/mkspecs/bitcoin-linux-g++ && \
   sed -i.old "s/arm-linux-gnueabi-/$(host)-/g" qtbase/mkspecs/bitcoin-linux-g++/qmake.conf && \
   echo "!host_build: QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   sed -i.old "s|QMAKE_CFLAGS            += |!host_build: QMAKE_CFLAGS            = $($(package)_cflags) $($(package)_cppflags) |" qtbase/mkspecs/win32-g++/qmake.conf && \
   sed -i.old "s|QMAKE_CXXFLAGS          += |!host_build: QMAKE_CXXFLAGS            = $($(package)_cxxflags) $($(package)_cppflags) |" qtbase/mkspecs/win32-g++/qmake.conf && \
   sed -i.old "0,/^QMAKE_LFLAGS_/s|^QMAKE_LFLAGS_|!host_build: QMAKE_LFLAGS            = $($(package)_ldflags)\n&|" qtbase/mkspecs/win32-g++/qmake.conf && \
   sed -i.old "s|QMAKE_CC                = clang|QMAKE_CC                = $($(package)_cc)|" qtbase/mkspecs/common/clang.conf && \
   sed -i.old "s|QMAKE_CXX               = clang++|QMAKE_CXX               = $($(package)_cxx)|" qtbase/mkspecs/common/clang.conf && \
   sed -i.old "s/LIBRARY_PATH/(CROSS_)?\0/g" qtbase/mkspecs/features/toolchain.prf
 endef
 
 define $(package)_config_cmds
   export PKG_CONFIG_SYSROOT_DIR=/ && \
   export PKG_CONFIG_LIBDIR=$(host_prefix)/lib/pkgconfig && \
   export PKG_CONFIG_PATH=$(host_prefix)/share/pkgconfig  && \
   cd qtbase && \
   ./configure $($(package)_config_opts) && \
   echo "host_build: QT_CONFIG ~= s/system-zlib/zlib" >> mkspecs/qconfig.pri && \
   echo "CONFIG += force_bootstrap" >> mkspecs/qconfig.pri && \
   cd .. && \
   $(MAKE) -C qtbase sub-src-clean && \
   qtbase/bin/qmake -o qttranslations/Makefile qttranslations/qttranslations.pro && \
   qtbase/bin/qmake -o qttranslations/translations/Makefile qttranslations/translations/translations.pro && \
   qtbase/bin/qmake -o qttools/src/linguist/Makefile qttools/src/linguist/linguist.pro && \
   qtbase/bin/qmake -o qttools/src/linguist/lconvert/Makefile qttools/src/linguist/lconvert/lconvert.pro && \
   qtbase/bin/qmake -o qttools/src/linguist/lrelease/Makefile qttools/src/linguist/lrelease/lrelease.pro && \
   qtbase/bin/qmake -o qttools/src/linguist/lupdate/Makefile qttools/src/linguist/lupdate/lupdate.pro
 endef
 
 define $(package)_build_cmds
   $(MAKE) -j$(JOBS) -C qtbase && \
   $(MAKE) -j$(JOBS) -C qttools/src/linguist/lconvert && \
   $(MAKE) -j$(JOBS) -C qttools/src/linguist/lrelease && \
   $(MAKE) -j$(JOBS) -C qttools/src/linguist/lupdate && \
   $(MAKE) -j$(JOBS) -C qttranslations
 endef
 
 define $(package)_stage_cmds
   $(MAKE) -C qtbase INSTALL_ROOT=$($(package)_staging_dir) install && \
   $(MAKE) -C qttools/src/linguist/lconvert INSTALL_ROOT=$($(package)_staging_dir) install && \
   $(MAKE) -C qttools/src/linguist/lrelease INSTALL_ROOT=$($(package)_staging_dir) install && \
   $(MAKE) -C qttools/src/linguist/lupdate INSTALL_ROOT=$($(package)_staging_dir) install && \
   $(MAKE) -C qttools/src/linguist INSTALL_ROOT=$($(package)_staging_dir) install_cmake_linguist_tools_files && \
   $(MAKE) -C qttranslations INSTALL_ROOT=$($(package)_staging_dir) install_subtargets
 endef
 
 define $(package)_postprocess_cmds
   rm -rf native/lib/ lib/lib*.la
 endef
diff --git a/depends/patches/qt/fix_qpainter_non_determinism.patch b/depends/patches/qt/fix_qpainter_non_determinism.patch
new file mode 100644
index 000000000..3cfcc22f0
--- /dev/null
+++ b/depends/patches/qt/fix_qpainter_non_determinism.patch
@@ -0,0 +1,63 @@
+commit 2a8f7dc6ddfc414a66491522501c1574a1343ee1
+Author: Andrew Chow <achow101-github@achow101.com>
+Date:   Sat Nov 21 01:11:04 2020 -0500
+
+    build: Fix determinism issue when building with Clang 8
+
+    When building Qt with LLVM/Clang 8 under -O3 (the default), we run into
+    a determinism issue in `qt_interset_spans`. The issue has been fixed for
+    LLVM/Clang 9, see
+    https://github.com/llvm/llvm-project/commit/db101864bdc938deb1d63fe4f7da761bd38e5cae
+    and https://reviews.llvm.org/D64601, however this fix was not backported
+    to 8.x. Once LLVM/Clang 9 is used, this patch can be dropped.
+
+    The particular issue appears to be an optimization done by -O3 which
+    adds a temporary variable for `spans->y` in `qt_intersect_spans`. When
+    it does this, sometimes it chooses to use a 32-bit movs instruction
+    (movswl), and other times it chooses a 64-bit movs instruction (movswq).
+    By patching `qt_intersect_spans` to always make a temporary variable for
+    `spans->y`, we are able to sidestep this problem.
+
+diff --git a/qtbase/src/gui/painting/qpaintengine_raster.cpp b/qtbase/src/gui/painting/qpaintengine_raster.cpp
+index 92ab6e8375..f018009e0b 100644
+--- a/qtbase/src/gui/painting/qpaintengine_raster.cpp
++++ b/qtbase/src/gui/painting/qpaintengine_raster.cpp
+@@ -3971,22 +3971,23 @@ static const QSpan *qt_intersect_spans(const QClipData *clip, int *currentClip,
+     const QSpan *clipEnd = clip->m_spans + clip->count;
+ 
+     while (available && spans < end ) {
++        const short spans_y = spans->y;
+         if (clipSpans >= clipEnd) {
+             spans = end;
+             break;
+         }
+-        if (clipSpans->y > spans->y) {
++        if (clipSpans->y > spans_y) {
+             ++spans;
+             continue;
+         }
+-        if (spans->y != clipSpans->y) {
+-            if (spans->y < clip->count && clip->m_clipLines[spans->y].spans)
+-                clipSpans = clip->m_clipLines[spans->y].spans;
++        if (spans_y != clipSpans->y) {
++            if (spans_y < clip->count && clip->m_clipLines[spans_y].spans)
++                clipSpans = clip->m_clipLines[spans_y].spans;
+             else
+                 ++clipSpans;
+             continue;
+         }
+-        Q_ASSERT(spans->y == clipSpans->y);
++        Q_ASSERT(spans_y == clipSpans->y);
+ 
+         int sx1 = spans->x;
+         int sx2 = sx1 + spans->len;
+@@ -4005,7 +4006,7 @@ static const QSpan *qt_intersect_spans(const QClipData *clip, int *currentClip,
+         if (len) {
+             out->x = qMax(sx1, cx1);
+             out->len = qMin(sx2, cx2) - out->x;
+-            out->y = spans->y;
++            out->y = spans_y;
+             out->coverage = qt_div_255(spans->coverage * clipSpans->coverage);
+             ++out;
+             --available;
+