diff --git a/pkgs/applications/misc/qcad/default.nix b/pkgs/applications/misc/qcad/default.nix
index 6b2418ab57c..19e5d18fe93 100644
--- a/pkgs/applications/misc/qcad/default.nix
+++ b/pkgs/applications/misc/qcad/default.nix
@@ -10,18 +10,20 @@
 , qtsvg
 , qtxmlpatterns
 , qttools
-, lib, stdenv
+, lib
+, stdenv
+, installShellFiles
 }:
 
 mkDerivationWith stdenv.mkDerivation rec {
   pname = "qcad";
-  version = "3.26.0.1";
+  version = "3.26.1.0";
 
   src = fetchFromGitHub {
     owner = "qcad";
     repo = "qcad";
     rev = "v${version}";
-    sha256 = "sha256-V+QlwM8BWmcarwZtqJfc+MYHOZgIH1W5R8m2EHhNJls=";
+    sha256 = "sha256-OWAc7g8DiJR3z6dUF5D0Yo3wnRKd1Xe7D1eq15NRW5c=";
   };
 
   patches = [
@@ -36,7 +38,7 @@ mkDerivationWith stdenv.mkDerivation rec {
         src/3rdparty/qt-labs-qtscriptgenerator-5.14.0/qt-labs-qtscriptgenerator-5.14.0.pro \
         src/3rdparty/qt-labs-qtscriptgenerator-${qtbase.version}/qt-labs-qtscriptgenerator-${qtbase.version}.pro
     fi
- '';
+  '';
 
   qmakeFlags = [
     "MUPARSER_DIR=${muparser}"
@@ -65,15 +67,27 @@ mkDerivationWith stdenv.mkDerivation rec {
     cp -r scripts $out/lib
     cp -r plugins $out/lib/plugins
     cp -r patterns $out/lib/patterns
+    cp -r fonts $out/lib/fonts
+    cp -r libraries $out/lib/libraries
+    cp -r linetypes $out/lib/linetypes
+    cp -r ts $out/lib/ts
 
     # workaround to fix the library browser:
     rm -r $out/lib/plugins/sqldrivers
     ln -s -t $out/lib/plugins ${qtbase}/${qtbase.qtPluginPrefix}/sqldrivers
 
+    rm -r $out/lib/plugins/printsupport
+    ln -s -t $out/lib/plugins ${qtbase}/${qtbase.qtPluginPrefix}/printsupport
+
+    rm -r $out/lib/plugins/imageformats
+    ln -s -t $out/lib/plugins ${qtbase}/${qtbase.qtPluginPrefix}/imageformats
+
     install -Dm644 scripts/qcad_icon.svg $out/share/icons/hicolor/scalable/apps/qcad.svg
 
+    installManPage qcad.1
+
     runHook postInstall
-    '';
+  '';
 
   buildInputs = [
     boost
@@ -89,6 +103,7 @@ mkDerivationWith stdenv.mkDerivation rec {
     pkg-config
     qmake
     qttools
+    installShellFiles
   ];
 
   meta = with lib; {
diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index b13c50f18d2..0522f6f397b 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -265,10 +265,10 @@ in {
   };
 
   ruby_3_0 = generic {
-    version = rubyVersion "3" "0" "0" "";
+    version = rubyVersion "3" "0" "1" "";
     sha256 = {
-      src = "0a4fmxafxvkg1m738g2lmkhipwnmd96kzqy1m9kvk3n1l50x2gm1";
-      git = "0fvnxv97m94nridlc5nvvrlg53pr5g042dkfc5ysd327s7xj4cjp";
+      src = "09vpnxxcxc46qv40xbxr9xkdpbgb0imdy25l2vpsxxlr47djb61n";
+      git = "0vricyhnnczcbsgvz65pdhi9yx1i34zarbjlc5y5mcmj01y9r7ar";
     };
   };
 }
diff --git a/pkgs/development/interpreters/ruby/patchsets.nix b/pkgs/development/interpreters/ruby/patchsets.nix
index 3abba61bc24..dcd0a653836 100644
--- a/pkgs/development/interpreters/ruby/patchsets.nix
+++ b/pkgs/development/interpreters/ruby/patchsets.nix
@@ -11,7 +11,7 @@
     "${patchSet}/patches/ruby/2.7/head/railsexpress/02-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/2.7/head/railsexpress/03-more-detailed-stacktrace.patch"
   ];
-  "3.0.0" = ops useRailsExpress [
+  "3.0.1" = ops useRailsExpress [
     "${patchSet}/patches/ruby/3.0/head/railsexpress/01-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/3.0/head/railsexpress/02-malloc-trim.patch"
   ];
diff --git a/pkgs/development/libraries/science/math/mkl/default.nix b/pkgs/development/libraries/science/math/mkl/default.nix
index 34fea3162a9..1f60f4d9538 100644
--- a/pkgs/development/libraries/science/math/mkl/default.nix
+++ b/pkgs/development/libraries/science/math/mkl/default.nix
@@ -17,40 +17,57 @@
 let
   # Release notes and download URLs are here:
   # https://registrationcenter.intel.com/en/products/
-  version = "${year}.${spot}.${rel}";
+  version = "${mklVersion}.${rel}";
 
   # Darwin is pinned to 2019.3 because the DMG does not unpack; see here for details:
   # https://github.com/matthewbauer/undmg/issues/4
-  year = if stdenvNoCC.isDarwin then "2019" else "2020";
-  spot = if stdenvNoCC.isDarwin then "3" else "4";
-  rel = if stdenvNoCC.isDarwin then "199" else "304";
+  mklVersion = if stdenvNoCC.isDarwin then "2019.3" else "2021.1.1";
+  rel = if stdenvNoCC.isDarwin then "199" else "52";
 
-  # Replace `openmpSpot` by `spot` after 2020.
-  openmpSpot = if stdenvNoCC.isDarwin then spot else "3";
+  # Intel openmp uses its own versioning.
+  openmpVersion = if stdenvNoCC.isDarwin then "19.0.3" else "19.1.3";
+  openmpRel = "189";
 
-  rpm-ver = "${year}.${spot}-${rel}-${year}.${spot}-${rel}";
-
-  # Intel openmp uses its own versioning, but shares the spot release patch.
-  openmp = if stdenvNoCC.isDarwin then "19.0" else "19.1";
-  openmp-ver = "${openmp}.${openmpSpot}-${rel}-${openmp}.${openmpSpot}-${rel}";
+  # Thread Building Blocks release.
+  tbbRel = "119";
 
   shlibExt = stdenvNoCC.hostPlatform.extensions.sharedLibrary;
 
-in stdenvNoCC.mkDerivation {
+  oneapi-mkl = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-mkl-${mklVersion}-${mklVersion}-${rel}.x86_64.rpm";
+    hash = "sha256-G2Y7iX3UN2YUJhxcMM2KmhONf0ls9owpGlOo8hHOfqA=";
+  };
+
+  oneapi-mkl-common = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-mkl-common-${mklVersion}-${mklVersion}-${rel}.noarch.rpm";
+    hash = "sha256-HrMt2OcPIRxM8EL8SPjYTyuHJnC7RhPFUrvLhRH+7vc=";
+  };
+
+  oneapi-mkl-common-devel = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-mkl-common-devel-${mklVersion}-${mklVersion}-${rel}.noarch.rpm";
+    hash = "sha256-XDE2WFJzEcpujFmO2AvqQdipZMvKB6/G+ksBe2sE438=";
+  };
+
+  oneapi-mkl-devel = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-mkl-devel-${mklVersion}-${mklVersion}-${rel}.x86_64.rpm";
+    hash = "sha256-GhUJZ0Vr/ZXp10maie29/5ryU7zzX3F++wRCuuFcE0s=";
+  };
+
+  oneapi-openmp = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-openmp-${mklVersion}-${mklVersion}-${openmpRel}.x86_64.rpm";
+    hash = "sha256-yP2c4aQAFNRffjLoIZgWXLcNXbiez8smsgu2wXitefU=";
+  };
+
+  oneapi-tbb = fetchurl {
+    url = "https://yum.repos.intel.com/oneapi/intel-oneapi-tbb-${mklVersion}-${mklVersion}-${tbbRel}.x86_64.rpm";
+    hash = "sha256-K1BvhGoGVU2Zwy5vg2ZvJWBrSdh5uQwo0znt5039X0A=";
+  };
+
+in stdenvNoCC.mkDerivation ({
   pname = "mkl";
   inherit version;
 
-  src = if stdenvNoCC.isDarwin
-    then
-      (fetchurl {
-        url = "http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15235/m_mkl_${version}.dmg";
-        sha256 = "14b3ciz7995sqcd6jz7hc8g2x4zwvqxmgxgni46vrlb7n523l62f";
-      })
-    else
-      (fetchurl {
-        url = "https://registrationcenter-download.intel.com/akdlm/irc_nas/tec/16917/l_mkl_${version}.tgz";
-        hash = "sha256-IxTUZTaXTb0I8qTk+emhVdx+eeJ5jHTn3fqtAKWRfqU=";
-      });
+  dontUnpack = stdenvNoCC.isLinux;
 
   nativeBuildInputs = [ validatePkgConfig ] ++ (if stdenvNoCC.isDarwin
     then
@@ -63,30 +80,15 @@ in stdenvNoCC.mkDerivation {
       tar xzvf $f
     done
   '' else ''
-    # Common stuff
-    rpmextract rpm/intel-mkl-core-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-common-c-${rpm-ver}.noarch.rpm
-    rpmextract rpm/intel-mkl-common-f-${rpm-ver}.noarch.rpm
+    rpmextract ${oneapi-mkl}
+    rpmextract ${oneapi-mkl-common}
+    rpmextract ${oneapi-mkl-common-devel}
+    rpmextract ${oneapi-mkl-devel}
+    rpmextract ${oneapi-openmp}
+    rpmextract ${oneapi-tbb}
+  '';
 
-    # Dynamic libraries
-    rpmextract rpm/intel-mkl-cluster-rt-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-core-rt-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-gnu-f-rt-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-gnu-rt-${rpm-ver}.x86_64.rpm
-
-    # Intel OpenMP runtime
-    rpmextract rpm/intel-openmp-${openmp-ver}.x86_64.rpm
-  '' + (if enableStatic then ''
-    # Static libraries
-    rpmextract rpm/intel-mkl-cluster-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-gnu-${rpm-ver}.x86_64.rpm
-    rpmextract rpm/intel-mkl-gnu-f-${rpm-ver}.x86_64.rpm
-  '' else ''
-    # Take care of installing dynamic-only PkgConfig files during the installPhase
-  ''
-  );
-
-  installPhase = ''
+  installPhase = if stdenvNoCC.isDarwin then ''
     for f in $(find . -name 'mkl*.pc') ; do
       bn=$(basename $f)
       substituteInPlace $f \
@@ -95,42 +97,54 @@ in stdenvNoCC.mkDerivation {
         --replace "lib/intel64_lin" "lib" \
         --replace "lib/intel64" "lib"
     done
-
     for f in $(find opt/intel -name 'mkl*iomp.pc') ; do
       substituteInPlace $f \
         --replace "../compiler/lib" "lib"
     done
-  '' +
-    (if stdenvNoCC.isDarwin then ''
-      mkdir -p $out/lib
 
-      cp -r compilers_and_libraries_${version}/mac/mkl/include $out/
+    mkdir -p $out/lib
 
-      cp -r compilers_and_libraries_${version}/licensing/mkl/en/license.txt $out/lib/
-      cp -r compilers_and_libraries_${version}/mac/compiler/lib/* $out/lib/
-      cp -r compilers_and_libraries_${version}/mac/mkl/lib/* $out/lib/
-      cp -r compilers_and_libraries_${version}/mac/tbb/lib/* $out/lib/
+    cp -r compilers_and_libraries_${version}/mac/mkl/include $out/
 
-      mkdir -p $out/lib/pkgconfig
-      cp -r compilers_and_libraries_${version}/mac/mkl/bin/pkgconfig/* $out/lib/pkgconfig
+    cp -r compilers_and_libraries_${version}/licensing/mkl/en/license.txt $out/lib/
+    cp -r compilers_and_libraries_${version}/mac/compiler/lib/* $out/lib/
+    cp -r compilers_and_libraries_${version}/mac/mkl/lib/* $out/lib/
+    cp -r compilers_and_libraries_${version}/mac/tbb/lib/* $out/lib/
+
+    mkdir -p $out/lib/pkgconfig
+    cp -r compilers_and_libraries_${version}/mac/mkl/bin/pkgconfig/* $out/lib/pkgconfig
   '' else ''
-      mkdir -p $out/lib
-      cp license.txt $out/lib/
+    for f in $(find . -name 'mkl*.pc') ; do
+      bn=$(basename $f)
+      substituteInPlace $f \
+        --replace $\{MKLROOT} "$out" \
+        --replace "lib/intel64" "lib"
 
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/include $out/
+      sed -r -i "s|^prefix=.*|prefix=$out|g" $f
+    done
 
-      mkdir -p $out/lib/pkgconfig
-  '') +
+    for f in $(find opt/intel -name 'mkl*iomp.pc') ; do
+      substituteInPlace $f --replace "../compiler/lib" "lib"
+    done
+
+    # License
+    install -Dm0655 -t $out/share/doc/mkl opt/intel/oneapi/mkl/2021.1.1/licensing/en/license.txt
+
+    # Dynamic libraries
+    install -Dm0755 -t $out/lib opt/intel/oneapi/mkl/${mklVersion}/lib/intel64/*.so*
+    install -Dm0755 -t $out/lib opt/intel/oneapi/compiler/2021.1.1/linux/compiler/lib/intel64_lin/*.so*
+    install -Dm0755 -t $out/lib opt/intel/oneapi/tbb/2021.1.1/lib/intel64/gcc4.8/*.so*
+
+    # Headers
+    cp -r opt/intel/oneapi/mkl/${mklVersion}/include $out/
+  '' +
     (if enableStatic then ''
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/compiler/lib/intel64_lin/* $out/lib/
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/lib/intel64_lin/* $out/lib/
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/bin/pkgconfig/* $out/lib/pkgconfig
+      install -Dm0644 -t $out/lib opt/intel/oneapi/mkl/${mklVersion}/lib/intel64/*.a
+      install -Dm0644 -t $out/lib/pkgconfig opt/intel/oneapi/mkl/2021.1.1/tools/pkgconfig/*.pc
     '' else ''
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/compiler/lib/intel64_lin/*.so* $out/lib/
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/lib/intel64_lin/*.so* $out/lib/
-      cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/bin/pkgconfig/*dynamic*.pc $out/lib/pkgconfig
+      cp opt/intel/oneapi/mkl/${mklVersion}/lib/intel64/*.so* $out/lib
+      install -Dm0644 -t $out/lib/pkgconfig opt/intel/oneapi/mkl/2021.1.1/tools/pkgconfig/*dynamic*.pc
     '') + ''
-
     # Setup symlinks for blas / lapack
     ln -s $out/lib/libmkl_rt${shlibExt} $out/lib/libblas${shlibExt}
     ln -s $out/lib/libmkl_rt${shlibExt} $out/lib/libcblas${shlibExt}
@@ -159,13 +173,18 @@ in stdenvNoCC.mkDerivation {
   dontStrip = true;
   dontPatchELF = true;
 
-  passthru.tests.pkg-config = callPackage ./test { };
+  passthru.tests = {
+    pkg-config-dynamic-iomp = callPackage ./test { enableStatic = false; execution = "iomp"; };
+    pkg-config-static-iomp = callPackage ./test { enableStatic = true; execution = "iomp"; };
+    pkg-config-dynamic-seq = callPackage ./test { enableStatic = false; execution = "seq"; };
+    pkg-config-static-seq = callPackage ./test { enableStatic = true; execution = "seq"; };
+  };
 
   meta = with lib; {
-    description = "Intel Math Kernel Library";
+    description = "Intel OneAPI Math Kernel Library";
     longDescription = ''
-      Intel Math Kernel Library (Intel MKL) optimizes code with minimal effort
-      for future generations of Intel processors. It is compatible with your
+      Intel OneAPI Math Kernel Library (Intel oneMKL) optimizes code with minimal
+      effort for future generations of Intel processors. It is compatible with your
       choice of compilers, languages, operating systems, and linking and
       threading models.
     '';
@@ -174,4 +193,9 @@ in stdenvNoCC.mkDerivation {
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
     maintainers = with maintainers; [ bhipple ];
   };
-}
+} // lib.optionalAttrs stdenvNoCC.isDarwin {
+  src = fetchurl {
+    url = "http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15235/m_mkl_${version}.dmg";
+    sha256 = "14b3ciz7995sqcd6jz7hc8g2x4zwvqxmgxgni46vrlb7n523l62f";
+  };
+})
diff --git a/pkgs/development/libraries/science/math/mkl/test/default.nix b/pkgs/development/libraries/science/math/mkl/test/default.nix
index 688c0ec7c39..cb3355260d1 100644
--- a/pkgs/development/libraries/science/math/mkl/test/default.nix
+++ b/pkgs/development/libraries/science/math/mkl/test/default.nix
@@ -1,6 +1,14 @@
-{ stdenv, pkg-config, mkl }:
+{ stdenv
+, pkg-config
+, mkl
 
-stdenv.mkDerivation {
+, enableStatic ? false
+, execution ? "seq"
+}:
+
+let
+  linkType = if enableStatic then "static" else "dynamic";
+in stdenv.mkDerivation {
   pname = "mkl-test";
   version = mkl.version;
 
@@ -8,19 +16,19 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ mkl ];
+  buildInputs = [ (mkl.override { inherit enableStatic; }) ];
 
   doCheck = true;
 
   buildPhase = ''
     # Check regular Nix build.
-    gcc $(pkg-config --cflags --libs mkl-dynamic-ilp64-seq) test.c -o test
+    gcc test.c -o test $(pkg-config --cflags --libs mkl-${linkType}-ilp64-${execution})
 
     # Clear flags to ensure that we are purely relying on options
     # provided by pkg-config.
     NIX_CFLAGS_COMPILE="" \
     NIX_LDFLAGS="" \
-      gcc $(pkg-config --cflags --libs mkl-dynamic-ilp64-seq) test.c -o test
+      gcc test.c -o test $(pkg-config --cflags --libs mkl-${linkType}-ilp64-${execution})
   '';
 
   installPhase = ''
diff --git a/pkgs/development/libraries/x264/default.nix b/pkgs/development/libraries/x264/default.nix
index 93d0b42a889..ede8e1e317b 100644
--- a/pkgs/development/libraries/x264/default.nix
+++ b/pkgs/development/libraries/x264/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, lib, fetchurl, nasm }:
+{ stdenv, lib, fetchurl, nasm
+, enableShared ? !stdenv.hostPlatform.isStatic
+ }:
 
 stdenv.mkDerivation rec {
   pname = "x264";
@@ -28,7 +30,7 @@ stdenv.mkDerivation rec {
     export AS=$CC
   '';
 
-  configureFlags = [ "--enable-shared" ]
+  configureFlags = lib.optional enableShared [ "--enable-shared" ]
     ++ lib.optional (!stdenv.isi686) "--enable-pic"
     ++ lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "--cross-prefix=${stdenv.cc.targetPrefix}";
 
diff --git a/pkgs/development/python-modules/localimport/default.nix b/pkgs/development/python-modules/localimport/default.nix
new file mode 100644
index 00000000000..3c41618d5b8
--- /dev/null
+++ b/pkgs/development/python-modules/localimport/default.nix
@@ -0,0 +1,23 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "localimport";
+  version = "1.7.3";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-p7ACOzJRwH9hICMcxtVt/r+twEoFsDxPKGuarFnFIbo=";
+  };
+
+  pythonImportsCheck = [ "localimport" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/NiklasRosenstein/py-localimport";
+    description = "Isolated import of Python modules";
+    license = licenses.mit;
+    maintainers = with maintainers; [ AndersonTorres ];
+  };
+}
diff --git a/pkgs/development/python-modules/nodepy-runtime/default.nix b/pkgs/development/python-modules/nodepy-runtime/default.nix
new file mode 100644
index 00000000000..5be806e4cef
--- /dev/null
+++ b/pkgs/development/python-modules/nodepy-runtime/default.nix
@@ -0,0 +1,47 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, localimport
+, pathlib2
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "nodepy-runtime";
+  version = "2.1.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-6tSsD76EpCZxkdulv1BcUZtIXGWLG6PuII25J8STygE=";
+  };
+
+  propagatedBuildInputs = [
+    localimport
+    pathlib2
+    six
+  ];
+
+  pythonImportsCheck = [
+    "nodepy"
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/nodepy/nodepy";
+    description = "Runtime for Python inspired by Node.JS";
+    longDescription = ''
+      Node.py is a Python runtime and package manager compatible with CPython
+      2.7 and 3.3 – 3.6. It provides a separate import mechanism for modules
+      inspired by Node.js, bringing dependency management and ease of deployment
+      for Python applications up to par with other languages without virtual
+      environments.
+
+      Node.py comes with a built-in package manager that builds on Pip for
+      standard Python dependencies but also adds the capability to install
+      packages that are specifically developed for Node.py. To install the
+      dependencies of the package manager you must specify the [pm] install
+      extra.
+    '';
+    license = licenses.mit;
+    maintainers = with maintainers; [ AndersonTorres ];
+  };
+}
diff --git a/pkgs/development/python-modules/pywebview/default.nix b/pkgs/development/python-modules/pywebview/default.nix
index 545fb236732..a020517dcce 100644
--- a/pkgs/development/python-modules/pywebview/default.nix
+++ b/pkgs/development/python-modules/pywebview/default.nix
@@ -1,25 +1,53 @@
-{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
-, importlib-resources, pytest, xvfb_run }:
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, importlib-resources
+, pyqtwebengine
+, pytest
+, pythonOlder
+, qt5
+, xvfb_run
+}:
 
 buildPythonPackage rec {
   pname = "pywebview";
-  version = "3.3.1";
+  version = "3.4";
   disabled = pythonOlder "3.5";
 
   src = fetchFromGitHub {
     owner = "r0x0r";
     repo = "pywebview";
     rev = version;
-    sha256 = "015z7n0hdgkzn0p7aw1xsv6lwc260p8q67jx0zyd1zghnwyj8k79";
+    sha256 = "sha256-3JHwtw8oReolEl4k8cdt7GCVGNkfWWJN6EnZYHxzDO8=";
   };
 
-  propagatedBuildInputs = lib.optionals (pythonOlder "3.7") [ importlib-resources ];
+  nativeBuildInputs = [
+    qt5.wrapQtAppsHook
+  ];
 
-  checkInputs = [ pytest xvfb_run ];
+  propagatedBuildInputs = [
+    pyqtwebengine
+  ] ++ lib.optionals (pythonOlder "3.7") [ importlib-resources ];
+
+  checkInputs = [
+    pytest
+    xvfb_run
+  ];
 
   checkPhase = ''
+    # Cannot create directory /homeless-shelter/.... Error: FILE_ERROR_ACCESS_DENIED
+    export HOME=$TMPDIR
+    # QStandardPaths: XDG_RUNTIME_DIR not set
+    export XDG_RUNTIME_DIR=$HOME/xdg-runtime-dir
+
     pushd tests
+    substituteInPlace run.sh \
+      --replace "PYTHONPATH=.." "PYTHONPATH=$PYTHONPATH" \
+      --replace "pywebviewtest test_js_api.py::test_concurrent ''${PYTEST_OPTIONS}" "# skip flaky test_js_api.py::test_concurrent"
+
     patchShebangs run.sh
+    wrapQtApp run.sh
+
     xvfb-run -s '-screen 0 800x600x24' ./run.sh
     popd
   '';
diff --git a/pkgs/development/tools/build-managers/rebar3/default.nix b/pkgs/development/tools/build-managers/rebar3/default.nix
index 0c6450766b1..c2b10d823a3 100644
--- a/pkgs/development/tools/build-managers/rebar3/default.nix
+++ b/pkgs/development/tools/build-managers/rebar3/default.nix
@@ -3,7 +3,7 @@
   tree }:
 
 let
-  version = "3.14.2";
+  version = "3.14.4";
 
   # Dependencies should match the ones in:
   # https://github.com/erlang/rebar3/blob/${version}/rebar.lock
@@ -12,27 +12,27 @@ let
   bbmustache = fetchHex {
     pkg = "bbmustache";
     version = "1.10.0";
-    sha256 = "43effa3fd4bb9523157af5a9e2276c493495b8459fc8737144aa186cb13ce2ee";
+    sha256 = "1vp27jqnq65a8iqp7j4z8nw9ad29dhky5agmg8aj75dvshzzmvs3";
   };
   certifi = fetchHex {
     pkg = "certifi";
-    version = "2.5.2";
-    sha256 = "3b3b5f36493004ac3455966991eaf6e768ce9884693d9968055aeeeb1e575040";
+    version = "2.5.3";
+    sha256 = "040w1scglvqhcvc1ifdnlcyrbwr0smi00w4xi8h03c99775nllgd";
   };
   cf = fetchHex {
     pkg = "cf";
     version = "0.3.1";
-    sha256 = "315e8d447d3a4b02bcdbfa397ad03bbb988a6e0aa6f44d3add0f4e3c3bf97672";
+    sha256 = "0wknz4xkqkhgvlx4vx5619p8m65v7g87lfgsvfy04jrsgm28spii";
   };
   cth_readable = fetchHex {
     pkg = "cth_readable";
-    version = "1.4.9";
-    sha256 = "b4c6ababdb046c5f2fbb3c22f030b4c5a679083956dcdd29c1df0cb30b18da24";
+    version = "1.5.0";
+    sha256 = "0z58b6frqdnhyzrmbdf6x78l3izbbh5z5i3am8hqc253r7xwv0dx";
   };
   erlware_commons = fetchHex {
     pkg = "erlware_commons";
-    version = "1.3.1";
-    sha256 = "7aada93f368d0a0430122e39931b7fb4ac9e94dbf043cdc980ad4330fd9cd166";
+    version = "1.4.0";
+    sha256 = "1rp2vkgzqm6sax7fc13rh9x6qzxsgg718dnv7l0kmarvyifcyphq";
   };
   eunit_formatters = fetchHex {
     pkg = "eunit_formatters";
@@ -46,29 +46,26 @@ let
   };
   parse_trans = fetchHex {
     pkg = "parse_trans";
-    version = "3.3.0";
-    sha256 = "17ef63abde837ad30680ea7f857dd9e7ced9476cdd7b0394432af4bfc241b960";
+    version = "3.3.1";
+    sha256 = "12w8ai6b5s6b4hnvkav7hwxd846zdd74r32f84nkcmjzi1vrbk87";
   };
+
   providers = fetchHex {
     pkg = "providers";
     version = "1.8.1";
-    sha256 = "e45745ade9c476a9a469ea0840e418ab19360dc44f01a233304e118a44486ba0";
+    sha256 = "183b9128l4af60rs40agqh6kc6db33j4027ad6jajxn4x6nlamz4";
   };
+
   relx = fetchHex {
     pkg = "relx";
-    version = "4.1.0";
-    sha256 = "b94a3f96697a479ee5217a853345e0f4977bdf40d3c040af0d3d80fadad82af4";
+    version = "4.3.0";
+    sha256 = "0h044arh41sr92r1nlg176shavlv7pvw17alwklhszgwlr4hk3kk";
   };
+
   ssl_verify_fun = fetchHex {
     pkg = "ssl_verify_fun";
     version = "1.1.6";
-    sha256 = "bdb0d2471f453c88ff3908e7686f86f9be327d065cc1ec16fa4540197ea04680";
-  };
-
-  hex_core = fetchHex {
-    pkg = "hex_core";
-    version = "0.7.1";
-    sha256 = "05c60411511b6dc79affcd99a93e67d71e1b9d6abcb28ba75cd4ebc8585b8d02";
+    sha256 = "1026l1z1jh25z8bfrhaw0ryk5gprhrpnirq877zqhg253x3x5c5x";
   };
 in
 stdenv.mkDerivation rec {
@@ -81,7 +78,7 @@ stdenv.mkDerivation rec {
     owner = "erlang";
     repo = pname;
     rev = version;
-    sha256 = "02gz6xs8j5rm14r6dndcpdm8q3rl4mcj363gnnx4y5xvvfnv9bfa";
+    sha256 = "09bnqwli93sq1pcz4h88ks7qg7k8yrjy9fd46yyp8xdl7i4irwy2";
   };
 
   bootstrapper = ./rebar3-nix-bootstrap;
@@ -104,8 +101,6 @@ stdenv.mkDerivation rec {
     cp --no-preserve=mode -R ${relx} _checkouts/relx
     cp --no-preserve=mode -R ${ssl_verify_fun} _checkouts/ssl_verify_fun
 
-    cp --no-preserve=mode -R ${hex_core} _checkouts/hex_core
-
     # Bootstrap script expects the dependencies in _build/default/lib
     # TODO: Make it accept checkouts?
     for i in _checkouts/* ; do
diff --git a/pkgs/games/antsimulator/default.nix b/pkgs/games/antsimulator/default.nix
new file mode 100644
index 00000000000..b43b91d5cb9
--- /dev/null
+++ b/pkgs/games/antsimulator/default.nix
@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchFromGitHub, cmake, sfml }:
+
+stdenv.mkDerivation rec {
+  pname = "antsimulator";
+  version = "1.2";
+
+  src = fetchFromGitHub {
+    owner = "johnBuffer";
+    repo = "AntSimulator";
+    rev = "v${version}";
+    sha256 = "0wz80971rf86kb7mcnxwrq75vriwhmyir5s5n3wzml12rzfnj5f1";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ sfml ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    install -Dm755 ./AntSimulator $out/bin/antsimulator
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/johnBuffer/AntSimulator";
+    description = "Simple Ants simulator";
+    license = licenses.free;
+    maintainers = with maintainers; [ ivar ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/os-specific/linux/libcap/default.nix b/pkgs/os-specific/linux/libcap/default.nix
index 54fab6a7746..871e04648e4 100644
--- a/pkgs/os-specific/linux/libcap/default.nix
+++ b/pkgs/os-specific/linux/libcap/default.nix
@@ -14,8 +14,6 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-TelZDuCah8KC1Vhzf/tbYXXMv9JtWArdEN9E0PBH9sI=";
   };
 
-  patches = lib.optional isStatic ./no-shared-lib.patch;
-
   outputs = [ "out" "dev" "lib" "man" "doc" ]
     ++ lib.optional usePam "pam";
 
@@ -31,7 +29,7 @@ stdenv.mkDerivation rec {
     "PAM_CAP=${if usePam then "yes" else "no"}"
     "BUILD_CC=$(CC_FOR_BUILD)"
     "CC:=$(CC)"
-  ];
+  ] ++ lib.optional isStatic "SHARED=no";
 
   prePatch = ''
     # use full path to bash
diff --git a/pkgs/os-specific/linux/libcap/no-shared-lib.patch b/pkgs/os-specific/linux/libcap/no-shared-lib.patch
deleted file mode 100644
index 73dc7de063d..00000000000
--- a/pkgs/os-specific/linux/libcap/no-shared-lib.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-diff --git a/libcap/Makefile b/libcap/Makefile
-index de6a28d..7e4d8ac 100644
---- a/libcap/Makefile
-+++ b/libcap/Makefile
-@@ -22,7 +22,7 @@ MAJLIBNAME=$(LIBNAME).$(VERSION)
- MINLIBNAME=$(MAJLIBNAME).$(MINOR)
- GPERF_OUTPUT = _caps_output.gperf
- 
--all: $(MINLIBNAME) $(STACAPLIBNAME) pcs $(STAPSXLIBNAME)
-+all: $(STACAPLIBNAME) pcs $(STAPSXLIBNAME)
- 
- pcs: libcap.pc libpsx.pc
- 
-@@ -93,7 +93,7 @@ cap_test: cap_test.c libcap.h
- test: cap_test
- 	./cap_test
- 
--install: install-static install-shared
-+install: install-static
- 
- install-static: install-static-cap install-static-psx
- 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3a7541f6f36..1c62b787e0d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -154,6 +154,8 @@ in
 
   ankisyncd = callPackage ../servers/ankisyncd { };
 
+  antsimulator = callPackage ../games/antsimulator { };
+
   fiche = callPackage ../servers/fiche { };
 
   fishnet = callPackage ../servers/fishnet { };
@@ -2804,6 +2806,8 @@ in
 
   nix-template = callPackage ../tools/package-management/nix-template { };
 
+  nodepy-runtime = with python3.pkgs; toPythonApplication nodepy-runtime;
+
   nixpkgs-pytools = with python3.pkgs; toPythonApplication nixpkgs-pytools;
 
   noteshrink = callPackage ../tools/misc/noteshrink { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3e0a1e55701..bdcf445b076 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4012,6 +4012,8 @@ in {
 
   lmtpd = callPackage ../development/python-modules/lmtpd { };
 
+  localimport = callPackage ../development/python-modules/localimport { };
+
   localzone = callPackage ../development/python-modules/localzone { };
 
   locket = callPackage ../development/python-modules/locket { };
@@ -4647,6 +4649,8 @@ in {
 
   nodeenv = callPackage ../development/python-modules/nodeenv { };
 
+  nodepy-runtime = callPackage ../development/python-modules/nodepy-runtime { };
+
   node-semver = callPackage ../development/python-modules/node-semver { };
 
   noise = callPackage ../development/python-modules/noise { };