diff --git a/contrib/gitian-descriptors/gitian-linux.yml b/contrib/gitian-descriptors/gitian-linux.yml
--- a/contrib/gitian-descriptors/gitian-linux.yml
+++ b/contrib/gitian-descriptors/gitian-linux.yml
@@ -50,6 +50,7 @@
   HOST_LDFLAGS=-static-libstdc++
 
   export QT_RCC_TEST=1
+  export QT_RCC_SOURCE_DATE_OVERRIDE=1
   export GZIP="-9n"
   export TAR_OPTIONS="--mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export TZ="UTC"
diff --git a/contrib/gitian-descriptors/gitian-osx.yml b/contrib/gitian-descriptors/gitian-osx.yml
--- a/contrib/gitian-descriptors/gitian-osx.yml
+++ b/contrib/gitian-descriptors/gitian-osx.yml
@@ -41,6 +41,7 @@
   FAKETIME_PROGS="ar ranlib date dmg genisoimage"
 
   export QT_RCC_TEST=1
+  export QT_RCC_SOURCE_DATE_OVERRIDE=1
   export GZIP="-9n"
   export TAR_OPTIONS="--mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export TZ="UTC"
diff --git a/contrib/gitian-descriptors/gitian-win.yml b/contrib/gitian-descriptors/gitian-win.yml
--- a/contrib/gitian-descriptors/gitian-win.yml
+++ b/contrib/gitian-descriptors/gitian-win.yml
@@ -44,6 +44,7 @@
   HOST_CXXFLAGS="-O2 -g"
 
   export QT_RCC_TEST=1
+  export QT_RCC_SOURCE_DATE_OVERRIDE=1
   export GZIP="-9n"
   export TAR_OPTIONS="--mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export TZ="UTC"
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -8,7 +8,7 @@
 $(package)_linux_dependencies=freetype fontconfig libxcb libX11 xproto libXext
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib network widgets gui plugins testlib
-$(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch
+$(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=9822084f8e2d2939ba39f4af4c0c2320e45d5996762a9423f833055607604ed8
@@ -94,6 +94,7 @@
 $(package)_config_opts_x86_64_linux = -xplatform linux-g++-64
 $(package)_config_opts_mingw32  = -no-opengl -xplatform win32-g++ -device-option CROSS_COMPILE="$(host)-"
 $(package)_build_env  = QT_RCC_TEST=1
+$(package)_build_env += QT_RCC_SOURCE_DATE_OVERRIDE=1
 endef
 
 define $(package)_fetch_cmds
@@ -133,6 +134,7 @@
   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 &&\
   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 && \
diff --git a/depends/patches/qt/fix_rcc_determinism.patch b/depends/patches/qt/fix_rcc_determinism.patch
new file mode 100644
--- /dev/null
+++ b/depends/patches/qt/fix_rcc_determinism.patch
@@ -0,0 +1,15 @@
+--- old/qtbase/src/tools/rcc/rcc.cpp
++++ new/qtbase/src/tools/rcc/rcc.cpp
+@@ -207,7 +207,11 @@ void RCCFileInfo::writeDataInfo(RCCResourceLibrary &lib)
+     if (lib.formatVersion() >= 2) {
+         // last modified time stamp
+         const QDateTime lastModified = m_fileInfo.lastModified();
+-        lib.writeNumber8(quint64(lastModified.isValid() ? lastModified.toMSecsSinceEpoch() : 0));
++        quint64 lastmod = quint64(lastModified.isValid() ? lastModified.toMSecsSinceEpoch() : 0);
++        static const quint64 sourceDate = 1000 * qgetenv("QT_RCC_SOURCE_DATE_OVERRIDE").toULongLong();
++        if (sourceDate != 0)
++            lastmod = sourceDate;
++        lib.writeNumber8(lastmod);
+         if (text || pass1)
+             lib.writeChar('\n');
+     }