diff --git a/host-configs/LLNL/lassen-gcc-8-cuda-11.cmake b/host-configs/LLNL/lassen-gcc-8-cuda-11.cmake
index 3e9fd6783d..571f7b1563 100644
--- a/host-configs/LLNL/lassen-gcc-8-cuda-11.cmake
+++ b/host-configs/LLNL/lassen-gcc-8-cuda-11.cmake
@@ -16,4 +16,8 @@ set(MPI_Fortran_COMPILER ${MPI_HOME}/bin/mpifort CACHE PATH "")
 
 set(ENABLE_CUDA_NVTOOLSEXT ON CACHE BOOL "")
 
+# PYGEOSX
+set(ENABLE_PYGEOSX ON CACHE BOOL "")
+set(Python3_EXECUTABLE /usr/gapps/GEOSX/thirdPartyLibs/python/python3-lassen/python/bin/python CACHE PATH "")
+
 include(${CMAKE_CURRENT_LIST_DIR}/lassen-base.cmake)
diff --git a/src/coreComponents/functions/CMakeLists.txt b/src/coreComponents/functions/CMakeLists.txt
index 8fb39ce419..2f9591f498 100644
--- a/src/coreComponents/functions/CMakeLists.txt
+++ b/src/coreComponents/functions/CMakeLists.txt
@@ -24,6 +24,7 @@ set( functions_headers
      FunctionBase.hpp
      FunctionManager.hpp
      TableFunction.hpp
+     SymbolicFunction.hpp
    )
 
 #
@@ -33,15 +34,14 @@ set( functions_sources
      FunctionBase.cpp
      FunctionManager.cpp
      TableFunction.cpp
+     SymbolicFunction.cpp
      MultivariableTableFunction.cpp
    )
 
 if( ENABLE_MATHPRESSO )
   list( APPEND functions_headers
-        SymbolicFunction.hpp
         CompositeFunction.hpp )
   list( APPEND functions_sources
-        SymbolicFunction.cpp
         CompositeFunction.cpp )
 endif()
 
diff --git a/src/coreComponents/functions/SymbolicFunction.cpp b/src/coreComponents/functions/SymbolicFunction.cpp
index 26ae27b1be..70614b32db 100644
--- a/src/coreComponents/functions/SymbolicFunction.cpp
+++ b/src/coreComponents/functions/SymbolicFunction.cpp
@@ -36,9 +36,12 @@ using namespace dataRepository;
 
 SymbolicFunction::SymbolicFunction( const string & name,
                                     Group * const parent ):
-  FunctionBase( name, parent ),
+  FunctionBase( name, parent )
+  #ifdef GEOS_USE_MATHPRESSO
+  ,
   parserContext(),
-  parserExpression()
+  parserExpression(),
+  #endif
 {
   registerWrapper( keys::variableNames, &m_variableNames ).
     setRTTypeName( rtTypes::CustomTypes::groupNameRefArray ).
@@ -56,6 +59,8 @@ SymbolicFunction::SymbolicFunction( const string & name,
 SymbolicFunction::~SymbolicFunction()
 {}
 
+
+#ifdef GEOS_USE_MATHPRESSO
 class GeosxMathpressoLogger : public mathpresso::OutputLog
 {
 public:
@@ -106,9 +111,11 @@ class GeosxMathpressoLogger : public mathpresso::OutputLog
   std::ostringstream m_stream;
 
 };
+#endif
 
 void SymbolicFunction::initializeFunction()
 {
+  #ifdef GEOS_USE_MATHPRESSO
   // Register variables
   for( localIndex ii=0; ii<m_variableNames.size(); ++ii )
   {
@@ -124,6 +131,9 @@ void SymbolicFunction::initializeFunction()
     return parserExpression.compile( parserContext, m_expression.c_str(), mathpresso::kNoOptions, &outputLog );
   }();
   GEOS_ERROR_IF( err != mathpresso::kErrorOk, "MathPresso JIT Compiler Error" );
+  #else
+  GEOS_LOG_RANK_0("Skipping SymbolicFunction evaluation");
+  #endif
 }
 
 REGISTER_CATALOG_ENTRY( FunctionBase, SymbolicFunction, string const &, Group * const )
diff --git a/src/coreComponents/functions/SymbolicFunction.hpp b/src/coreComponents/functions/SymbolicFunction.hpp
index 5f0c3ea79e..0565c5fe9f 100644
--- a/src/coreComponents/functions/SymbolicFunction.hpp
+++ b/src/coreComponents/functions/SymbolicFunction.hpp
@@ -17,8 +17,9 @@
 #define GEOS_FUNCTIONS_SYMBOLICFUNCTION_HPP_
 
 #include "FunctionBase.hpp"
-
+#ifdef GEOSX_USE_MATHPRESSO
 #include <mathpresso/mathpresso.h>
+#endif
 
 namespace geos
 {
@@ -73,7 +74,12 @@ class SymbolicFunction : public FunctionBase
    */
   inline real64 evaluate( real64 const * const input ) const override final
   {
+    #ifdef GEOSX_USE_MATHPRESSO
     return parserExpression.evaluate( reinterpret_cast< void * >( const_cast< real64 * >(input) ) );
+    #else
+    GEOSX_ERROR( "SymbolicFunction evaluation is not enabled in this build of GEOSX" );
+    return 0.0;
+    #endif
   }
 
 
@@ -92,9 +98,11 @@ class SymbolicFunction : public FunctionBase
 
 
 private:
+  #ifdef GEOSX_USE_MATHPRESSO
   // Symbolic math driver objects
   mathpresso::Context parserContext;
   mathpresso::Expression parserExpression;
+  #endif
 
   /// Symbolic expression variable names
   string_array m_variableNames;