diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
index e3c9841..75c6399 100644
--- a/.github/workflows/docker.yaml
+++ b/.github/workflows/docker.yaml
@@ -2,8 +2,9 @@ name: docker
 
 on:
   push:
-#  schedule:
-#  - cron: "22 2 * * 2"
+  schedule:
+    - cron: "22 2 * * 2"
+  workflow_dispatch:
     
 jobs:
   build:
@@ -11,22 +12,22 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     #- name: Set up QEMU
     #  uses: docker/setup-qemu-action@v1
 
     - name: Buildx
-      uses: docker/setup-buildx-action@v1
+      uses: docker/setup-buildx-action@v2
 
     - name: Login
-      uses: docker/login-action@v1
+      uses: docker/login-action@v2
       with:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}
         
     - name: Build and push
-      uses: docker/build-push-action@v2
+      uses: docker/build-push-action@v4
       with:
         context: .
         push: true
@@ -36,7 +37,7 @@ jobs:
       run: date --rfc-3339=seconds > lastBuild.txt
 
     - name: Commit and push
-      uses: EndBug/add-and-commit@v7
+      uses: EndBug/add-and-commit@v9
       with:
         add: "lastBuild.txt"
         push: true
diff --git a/Dockerfile b/Dockerfile
index 476c5bd..7aaea94 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,6 +14,7 @@ RUN apt-get update -qq \
 ## Compiler flags from https://www.stats.ox.ac.uk/pub/bdr/memtests/README.txt
 ##
 ## Also add   git autotools-dev automake  so that we can build littler from source
+##            libclang-rt-16-dev          now required
 ##
 RUN apt-get update -qq \
 	&& apt-get install -t unstable -y --no-install-recommends \
@@ -32,6 +33,7 @@ RUN apt-get update -qq \
 		libblas-dev \
 		libbz2-dev \
 		libcairo2-dev \
+                libclang-rt-16-dev \
 		libcurl4-openssl-dev \
 		libjpeg-dev \
 		liblapack-dev \
@@ -87,13 +89,12 @@ RUN cd /tmp/R-devel \
 	   R_PRINTCMD=/usr/bin/lpr \
 	   LIBnn=lib \
 	   AWK=/usr/bin/awk \
-	   CC="clang -fsanitize=address,undefined -fno-sanitize=float-divide-by-zero -fno-omit-frame-pointer -fsanitize-address-use-after-scope -fno-sanitize=alignment" \
-	   CXX="clang++ -stdlib=libc++ -fsanitize=address,undefined -fno-sanitize=float-divide-by-zero -fno-omit-frame-pointer -fsanitize-address-use-after-scope -fno-sanitize=alignment -frtti" \
-	   CFLAGS="-g -O3 -Wall -pedantic -mtune=native" \
+	   CC="clang -fsanitize=address,undefined -fno-sanitize=float-divide-by-zero -fno-sanitize=alignment -fno-omit-frame-pointer" \
+	   CXX="clang++ -fsanitize=address,undefined -fno-sanitize=float-divide-by-zero -fno-sanitize=alignment -fno-omit-frame-pointer -frtti" \
+	   CFLAGS="-g -O3 -Wall -pedantic" \
 	   FFLAGS="-g -O2 -mtune=native" \
-	   FCFLAGS="-g -O2 -mtune=native" \
-	   CXXFLAGS="-g -O3 -Wall -pedantic -mtune=native" \
-	   MAIN_LD="clang++ -stdlib=libc++ -fsanitize=undefined,address" \
+           CXXFLAGS="-g -O3 -Wall -pedantic" \
+           MAIN_LD="clang++ -fsanitize=undefined,address" \
 	   FC="gfortran" \
 	   F77="gfortran" \
 	   ASAN_OPTIONS=detect_leaks=0 \