diff --git a/setup.sh b/setup.sh
new file mode 100644
index 0000000..49ccfd4
--- /dev/null
+++ b/setup.sh
@@ -0,0 +1,63 @@
+source /cvmfs/cms.cern.ch/cmsset_default.sh
+
+# Determine the RHEL (Red Hat Enterprise Linux) version
+RHELREL=$(cat /etc/redhat-release)
+if [[ "$(hostname)" == "uaf-10.t2.ucsd.edu" ]]; then
+    RHELVER=7
+elif [[ "$(hostname)" == "uaf-8.t2.ucsd.edu" ]]; then
+    RHELVER=7
+elif [[ "$(hostname)" == "uaf-1.t2.ucsd.edu" ]]; then
+    RHELVER=7
+elif [[ $RHELREL == 'CentOS Linux release 7.9.2009 (Core)' ]]; then
+    RHELVER=7
+elif [[ "$(hostname)" == "uaf-2.t2.ucsd.edu" ]]; then
+    RHELVER=8
+elif [[ "$(hostname)" == "uaf-3.t2.ucsd.edu" ]]; then
+    RHELVER=8
+elif [[ $RHELREL == 'AlmaLinux release 8.8 (Sapphire Caracal)' ]]; then
+    RHELVER=8
+else
+    echo "WARNING: guessing that the OS is RHEL7; please check and adjust accordingly!"
+    RHELVER=7
+fi
+
+
+# Set up CMSSW 'environment'
+if [[ $RHELVER == 7 ]]; then
+    cd /cvmfs/cms.cern.ch/slc7_amd64_gcc900/cms/cmssw/CMSSW_12_2_0/src
+    cmsenv
+    echo "Now using CMSSW v12.2.0 (RHEL7)"
+elif [[ $RHELVER == 8 ]]; then
+    cd /cvmfs/cms.cern.ch/el8_amd64_gcc11/cms/cmssw/CMSSW_12_5_0/src
+    cmsenv
+    echo "Now using CMSSW v12.5.0 (RHEL8)"
+fi
+cd - &> /dev/null
+
+# Modify PATH
+LIBPATHS="
+$CMSSW_BASE/lib/$SCRAM_ARCH
+"
+for LIBPATH in $LIBPATHS; do
+    # Add library to LD_LIBRARY_PATH
+    if [[ "$LD_LIBRARY_PATH" != *"$LIBPATH"* ]]; then
+        export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIBPATH
+    fi
+    # Add library to ROOT_INCLUDE_PATH
+    if [[ "$ROOT_INCLUDE_PATH" != *"$LIBPATH"* ]]; then
+        export ROOT_INCLUDE_PATH=$ROOT_INCLUDE_PATH:$LIBPATH
+    fi
+done
+
+# Export some useful CMSSW paths
+CMSSW_EXT=$CMSSW_BASE/../../../external
+if [[ $RHELVER == 7 ]]; then
+    export CORRECTIONLIBDIR=$CMSSW_EXT/py3-correctionlib/2.0.0-0c4f44c8dd5561d8c0660135feeb81f4/lib/python3.9/site-packages/correctionlib
+    export BOOSTDIR=$CMSSW_EXT/boost/1.67.0
+elif [[ $RHELVER == 8 ]]; then
+    export CORRECTIONLIBDIR=$CMSSW_EXT/py3-correctionlib/2.1.0-6711d4d6283f175d9b6fd011bbaad506/lib/python3.9/site-packages/correctionlib
+    export BOOSTDIR=$CMSSW_EXT/boost/1.80.0-7f4aeae1bffcf24aa4723f09435633c2
+fi
+
+# Add current working directory to Python PATH
+export PYTHONPATH=$PYTHONPATH:$PWD