diff --git a/set_precompiled_libraries.cmake b/set_precompiled_libraries.cmake
index 0336429d..8273995e 100644
--- a/set_precompiled_libraries.cmake
+++ b/set_precompiled_libraries.cmake
@@ -1,20 +1,22 @@
+set(PRECOMPILED_DIR "${PROJECT_SOURCE_DIR}/precompiled_libraries")
+
 if (${CMAKE_Fortran_COMPILER_ID} STREQUAL "GNU" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-gcc-rls/jsonfortran/")
+	set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/linux-gcc-rls/jsonfortran/")
 	set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}libjsonfortran.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-		set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-nvhpc-rls/jsonfortran/")
+		set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/linux-nvhpc-rls/jsonfortran/")
 		set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}libjsonfortran.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intel-rls/jsonfortran/")
+	set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/linux-intel-rls/jsonfortran/")
 	set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}libjsonfortran.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intelLLVM-rls/jsonfortran/")
+	set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/linux-intelLLVM-rls/jsonfortran/")
 	set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}libjsonfortran-static.a)
 elseif(${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-	set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/windows-intel-rls/jsonfortran/")
+	set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/windows-intel-rls/jsonfortran/")
 	set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}jsonfortran.lib)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-	set(JSONFORTRAN_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/windows-intelLLVM-rls/jsonfortran/")
+	set(JSONFORTRAN_DIR "${PRECOMPILED_DIR}/windows-intelLLVM-rls/jsonfortran/")
 	set(JSONFORTRAN_LIB ${JSONFORTRAN_DIR}jsonfortran-static.lib)
 else()
 	message(FATAL_ERROR "json-fortran precompiled libraries for this platform and/or compiler have not been found.")
@@ -23,7 +25,7 @@ include_directories(${JSONFORTRAN_DIR}/include/)
 MESSAGE(STATUS "Using json-fortran precompiled libraries at: " ${JSONFORTRAN_DIR})
 
 if (${CMAKE_Fortran_COMPILER_ID} STREQUAL "GNU" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(LAPACK_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-gcc-rls/lapack/")
+	set(LAPACK_DIR "${PRECOMPILED_DIR}/linux-gcc-rls/lapack/")
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.a)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
@@ -31,19 +33,19 @@ elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC" AND ${CMAKE_SYSTEM_NAME} S
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.a)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(LAPACK_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intel-rls/lapack/")
+	set(LAPACK_DIR "${PRECOMPILED_DIR}/linux-intel-rls/lapack/")
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.a)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(LAPACK_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intelLLVM-rls/lapack/")
+	set(LAPACK_DIR "${PRECOMPILED_DIR}/linux-intelLLVM-rls/lapack/")
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.a)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.a)
 elseif(${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-	set(LAPACK_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/windows-intel-rls/lapack/")
+	set(LAPACK_DIR "${PRECOMPILED_DIR}/windows-intel-rls/lapack/")
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.lib)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.lib)
 elseif(${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-	set(LAPACK_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/windows-intelLLVM-rls/lapack/")
+	set(LAPACK_DIR "${PRECOMPILED_DIR}/windows-intelLLVM-rls/lapack/")
 	set(LAPACK_LIB ${LAPACK_DIR}liblapack.lib)
 	set(BLAS_LIB ${LAPACK_DIR}libblas.lib)
 else()
@@ -52,23 +54,23 @@ endif()
 MESSAGE(STATUS "Using lapack precompiled libraries at: " ${LAPACK_DIR})
 
 if (${CMAKE_Fortran_COMPILER_ID} STREQUAL "GNU" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-gcc-rls/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/linux-gcc-rls/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}libngspice.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-gcc-rls/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/linux-gcc-rls/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}libngspice.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intel-dbg/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/linux-intel-dbg/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}libngspice.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND ${CMAKE_BUILD_TYPE} STREQUAL "Debug")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intelLLVM-dbg/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/linux-intelLLVM-dbg/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}libngspice.a)
 elseif (${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM" AND ${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intelLLVM-rls/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/linux-intelLLVM-rls/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}libngspice.a)
 elseif ((${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" OR ${CMAKE_Fortran_COMPILER_ID} STREQUAL "IntelLLVM") AND 
 		${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-	set(NGSPICE_DIR "${CMAKE_SOURCE_DIR}/precompiled_libraries/windows-intel-rls/ngspice/")
+	set(NGSPICE_DIR "${PRECOMPILED_DIR}/windows-intel-rls/ngspice/")
 	set(NGSPICE_LIB ${NGSPICE_DIR}ngspice.lib)
 	add_library(ngspice SHARED IMPORTED)
 	set_target_properties(ngspice PROPERTIES 
@@ -86,7 +88,7 @@ if (CompileWithHDF)
 	if(CMAKE_Fortran_COMPILER_ID MATCHES "GNU" OR ${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC")
 		# System libraries. Install with sudo apt install libhdf5	    
 	elseif(${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" OR CMAKE_Fortran_COMPILER_ID MATCHES "IntelLLVM")
-		set(HDF5_DIR ${CMAKE_SOURCE_DIR}/precompiled_libraries/linux-intel-rls/hdf5/cmake/)
+		set(HDF5_DIR ${PRECOMPILED_DIR}/linux-intel-rls/hdf5/cmake/)
 	endif()
 	
 	find_package(HDF5 REQUIRED COMPONENTS Fortran HL)