diff --git a/clhep.spec b/clhep.spec
index 142a138ec84..b712467baa3 100644
--- a/clhep.spec
+++ b/clhep.spec
@@ -1,6 +1,6 @@
-### RPM external clhep 2.4.5.1
+### RPM external clhep 2.4.6.0
 
-%define tag f256fe37039681f7856f0e324ccf9337cdc35b51
+%define tag 06b39fc5f06924728af27f6b0df1ffdac174dff3
 %define branch cms/v%{realversion}
 %define github_user cms-externals
 Source: git+https://github.com/%github_user/%{n}.git?obj=%{branch}/%{tag}&export=%{n}-%{realversion}&output=/%{n}-%{realversion}.tgz
diff --git a/dd4hep.spec b/dd4hep.spec
index 0b9e8288181..aa36502b081 100644
--- a/dd4hep.spec
+++ b/dd4hep.spec
@@ -9,6 +9,18 @@ Source: git+https://github.com/%{github_user}/DD4hep.git?obj=%{branch}/%{tag}&ex
 BuildRequires: cmake
 Requires: root boost clhep xerces-c geant4
 
+%define cmake_fixed_args \\\
+  -DCMAKE_INSTALL_PREFIX='%{i}' \\\
+  -DBoost_NO_BOOST_CMAKE=ON \\\
+  -DDD4HEP_USE_XERCESC=ON \\\
+  -DDD4HEP_USE_PYROOT=ON \\\
+  -DCMAKE_CXX_STANDARD=17 \\\
+  -DCMAKE_BUILD_TYPE=Release \\\
+  -DCMAKE_CXX_FLAGS_RELEASE='-O2 -DNDEBUG' \\\
+  -DDD4HEP_USE_GEANT4_UNITS=ON \\\
+  -DXERCESC_ROOT_DIR=${XERCES_C_ROOT} \\\
+  -DCMAKE_PREFIX_PATH="${CLHEP_ROOT};${XERCES_C_ROOT}"
+
 %prep
 
 %setup -n %{n}-%{realversion}
@@ -16,25 +28,16 @@ Requires: root boost clhep xerces-c geant4
 %build
 
 export BOOST_ROOT
-CMAKE_ARGS="-DCMAKE_INSTALL_PREFIX='%{i}' \
-      -DBoost_NO_BOOST_CMAKE=ON \
-      -DDD4HEP_USE_XERCESC=ON \
-      -DXERCESC_ROOT_DIR=${XERCES_C_ROOT} \
-      -DDD4HEP_USE_PYROOT=ON \
-      -DCMAKE_CXX_STANDARD=17 \
-      -DCMAKE_BUILD_TYPE=Release \
-      -DDD4HEP_USE_GEANT4_UNITS=ON \
-      -DCMAKE_PREFIX_PATH=${CLHEP_ROOT};${XERCES_C_ROOT}"
 
 #Build normal Shared D4Hep without Geant4
 rm -rf ../build; mkdir ../build; cd ../build
-cmake $CMAKE_ARGS -DBUILD_SHARED_LIBS=ON ../%{n}-%{realversion}
+cmake %{cmake_fixed_args} -DBUILD_SHARED_LIBS=ON ../%{n}-%{realversion}
 make %{makeprocesses} VERBOSE=1
 make install
 
 #Building DDG4 static
 rm -rf ../build-g4; mkdir ../build-g4; cd ../build-g4
-cmake $CMAKE_ARGS -DBUILD_SHARED_LIBS=OFF -DDD4HEP_USE_GEANT4=ON ../%{n}-%{realversion}
+cmake %{cmake_fixed_args} -DBUILD_SHARED_LIBS=OFF -DDD4HEP_USE_GEANT4=ON ../%{n}-%{realversion}
 cd DDG4
 make %{makeprocesses} VERBOSE=1
 for lib in $(ls ../lib/libDDG4*.a | sed 's|.a$||'); do
diff --git a/geant4.spec b/geant4.spec
index bfc0ce90405..7c618d4e069 100644
--- a/geant4.spec
+++ b/geant4.spec
@@ -51,6 +51,7 @@ cmake ../%{n}.%{realversion} \
   -DCMAKE_INSTALL_PREFIX:PATH="%i" \
   -DCMAKE_CXX_STANDARD:STRING="17" \
   -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_CXX_FLAGS_RELEASE="-O2 -DNDEBUG" \
   -DGEANT4_USE_GDML=ON \
   -DGEANT4_BUILD_TLS_MODEL:STRING="global-dynamic" \
   -DGEANT4_ENABLE_TESTING=OFF \
diff --git a/vecgeom.spec b/vecgeom.spec
index b9fbbaeaf57..df3aa63eee7 100644
--- a/vecgeom.spec
+++ b/vecgeom.spec
@@ -1,6 +1,6 @@
-### RPM external vecgeom v1.2.0
+### RPM external vecgeom v1.2.1
 ## INCLUDE compilation_flags
-%define tag 14d3a5c3d851794da4ca48d7659980dbf73384d4
+%define tag 12fc8ba12efe93de5aaa9ff8e51e093ae93a1633
 Source: git+https://gitlab.cern.ch/VecGeom/VecGeom.git?obj=master/%{tag}&export=%{n}-%{realversion}&output=/%{n}-%{realversion}.tgz
 BuildRequires: cmake gmake
 %define keep_archives true
@@ -23,6 +23,7 @@ cmake ../%{n}-%{realversion} \
   -DCMAKE_AR=$(which gcc-ar) \
   -DCMAKE_RANLIB=$(which gcc-ranlib) \
   -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_CXX_FLAGS_RELEASE="-O2 -DNDEBUG" \
   -DCMAKE_VERBOSE_MAKEFILE=TRUE \
 %if "%{?arch_build_flags}"
   -DCMAKE_CXX_FLAGS="%{arch_build_flags}" \