diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 10433c5d..1f70f44f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,7 @@ jobs:
   build:
 
     strategy:
+      fail-fast: false
       matrix:
         include:
           - {os: ubuntu-20.04, cc: gcc-10, cxx: g++-10}
@@ -25,6 +26,7 @@ jobs:
     - name: Install ubuntu dependencies
       if: matrix.os == 'ubuntu-20.04'
       run: >
+        sudo apt-get update &&
         sudo apt-get install
         clang-10
         g++-10
@@ -58,8 +60,8 @@ jobs:
     - name: Install homebrew dependencies
       if: matrix.os == 'macos-10.15'
       run: |
-        brew install gcc@10 llvm@10 boost fftw hdf5 open-mpi openblas numpy scipy mpi4py
-        pip3 install mako
+        brew install gcc@10 llvm boost fftw hdf5 open-mpi openblas
+        pip3 install mako numpy scipy mpi4py
         pip3 install -r requirements.txt
 
     - name: Build & Install TRIQS
diff --git a/Jenkinsfile b/Jenkinsfile
index 06a3a160..ce1891fb 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -53,8 +53,8 @@ for (int i = 0; i < dockerPlatforms.size(); i++) {
 
 /****************** osx builds (on host) */
 def osxPlatforms = [
-  ["gcc", ['CC=gcc-10', 'CXX=g++-10', 'FC=gfortran-10']],
-  ["clang", ['CC=$BREW/opt/llvm/bin/clang', 'CXX=$BREW/opt/llvm/bin/clang++', 'FC=gfortran-10', 'CXXFLAGS=-I$BREW/opt/llvm/include', 'LDFLAGS=-L$BREW/opt/llvm/lib']]
+  ["gcc", ['CC=gcc-11', 'CXX=g++-11', 'FC=gfortran-11']],
+  ["clang", ['CC=$BREW/opt/llvm/bin/clang', 'CXX=$BREW/opt/llvm/bin/clang++', 'FC=gfortran-11', 'CXXFLAGS=-I$BREW/opt/llvm/include', 'LDFLAGS=-L$BREW/opt/llvm/lib']]
 ]
 for (int i = 0; i < osxPlatforms.size(); i++) {
   def platformEnv = osxPlatforms[i]