diff --git a/cmd_linux.sh b/cmd_linux.sh
index 08717db5..0a4ef620 100644
--- a/cmd_linux.sh
+++ b/cmd_linux.sh
@@ -8,5 +8,12 @@ if [[ "$(pwd)" =~ " " ]]; then echo This script relies on Miniconda which can no
 CONDA_ROOT_PREFIX="$(pwd)/installer_files/conda"
 INSTALL_ENV_DIR="$(pwd)/installer_files/env"
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate env
 bash --init-file <(echo "source \"$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh\" && conda activate \"$INSTALL_ENV_DIR\"")
diff --git a/cmd_macos.sh b/cmd_macos.sh
index 08717db5..0a4ef620 100644
--- a/cmd_macos.sh
+++ b/cmd_macos.sh
@@ -8,5 +8,12 @@ if [[ "$(pwd)" =~ " " ]]; then echo This script relies on Miniconda which can no
 CONDA_ROOT_PREFIX="$(pwd)/installer_files/conda"
 INSTALL_ENV_DIR="$(pwd)/installer_files/env"
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate env
 bash --init-file <(echo "source \"$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh\" && conda activate \"$INSTALL_ENV_DIR\"")
diff --git a/cmd_windows.bat b/cmd_windows.bat
index 4a5f4f0e..606ff485 100644
--- a/cmd_windows.bat
+++ b/cmd_windows.bat
@@ -14,6 +14,13 @@ set TEMP=%cd%\installer_files
 set CONDA_ROOT_PREFIX=%cd%\installer_files\conda
 set INSTALL_ENV_DIR=%cd%\installer_files\env
 
+@rem environment isolation
+set PYTHONNOUSERSITE=1
+set PYTHONPATH=
+set PYTHONHOME=
+set "CUDA_PATH=%INSTALL_ENV_DIR%"
+set "CUDA_HOME=%CUDA_PATH%"
+
 @rem activate installer env
 call "%CONDA_ROOT_PREFIX%\condabin\conda.bat" activate "%INSTALL_ENV_DIR%" || ( echo. && echo Miniconda hook not found. && goto end )
 
diff --git a/start_linux.sh b/start_linux.sh
index 5359179c..89d00c1c 100644
--- a/start_linux.sh
+++ b/start_linux.sh
@@ -49,6 +49,13 @@ if [ ! -e "$INSTALL_ENV_DIR/bin/python" ]; then
     exit
 fi
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate installer env
 source "$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh" # otherwise conda complains about 'shell not initialized' (needed when running in a script)
 conda activate "$INSTALL_ENV_DIR"
diff --git a/start_macos.sh b/start_macos.sh
index 5686ce22..04ab07db 100644
--- a/start_macos.sh
+++ b/start_macos.sh
@@ -49,6 +49,13 @@ if [ ! -e "$INSTALL_ENV_DIR/bin/python" ]; then
     exit
 fi
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate installer env
 source "$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh" # otherwise conda complains about 'shell not initialized' (needed when running in a script)
 conda activate "$INSTALL_ENV_DIR"
diff --git a/start_windows.bat b/start_windows.bat
index 9af086e6..063942fe 100644
--- a/start_windows.bat
+++ b/start_windows.bat
@@ -46,6 +46,13 @@ if not exist "%INSTALL_ENV_DIR%" (
 @rem check if conda environment was actually created
 if not exist "%INSTALL_ENV_DIR%\python.exe" ( echo. && echo Conda environment is empty. && goto end )
 
+@rem environment isolation
+set PYTHONNOUSERSITE=1
+set PYTHONPATH=
+set PYTHONHOME=
+set "CUDA_PATH=%INSTALL_ENV_DIR%"
+set "CUDA_HOME=%CUDA_PATH%"
+
 @rem activate installer env
 call "%CONDA_ROOT_PREFIX%\condabin\conda.bat" activate "%INSTALL_ENV_DIR%" || ( echo. && echo Miniconda hook not found. && goto end )
 
diff --git a/update_linux.sh b/update_linux.sh
index 5966f9d9..f7be8440 100644
--- a/update_linux.sh
+++ b/update_linux.sh
@@ -8,6 +8,13 @@ if [[ "$(pwd)" =~ " " ]]; then echo This script relies on Miniconda which can no
 CONDA_ROOT_PREFIX="$(pwd)/installer_files/conda"
 INSTALL_ENV_DIR="$(pwd)/installer_files/env"
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate installer env
 source "$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh" # otherwise conda complains about 'shell not initialized' (needed when running in a script)
 conda activate "$INSTALL_ENV_DIR"
diff --git a/update_macos.sh b/update_macos.sh
index 5966f9d9..f7be8440 100644
--- a/update_macos.sh
+++ b/update_macos.sh
@@ -8,6 +8,13 @@ if [[ "$(pwd)" =~ " " ]]; then echo This script relies on Miniconda which can no
 CONDA_ROOT_PREFIX="$(pwd)/installer_files/conda"
 INSTALL_ENV_DIR="$(pwd)/installer_files/env"
 
+# environment isolation
+export PYTHONNOUSERSITE=1
+unset PYTHONPATH
+unset PYTHONHOME
+export CUDA_PATH="$INSTALL_ENV_DIR"
+export CUDA_HOME="$CUDA_PATH"
+
 # activate installer env
 source "$CONDA_ROOT_PREFIX/etc/profile.d/conda.sh" # otherwise conda complains about 'shell not initialized' (needed when running in a script)
 conda activate "$INSTALL_ENV_DIR"
diff --git a/update_windows.bat b/update_windows.bat
index 4701ab48..a44e2188 100644
--- a/update_windows.bat
+++ b/update_windows.bat
@@ -14,6 +14,13 @@ set TEMP=%cd%\installer_files
 set CONDA_ROOT_PREFIX=%cd%\installer_files\conda
 set INSTALL_ENV_DIR=%cd%\installer_files\env
 
+@rem environment isolation
+set PYTHONNOUSERSITE=1
+set PYTHONPATH=
+set PYTHONHOME=
+set "CUDA_PATH=%INSTALL_ENV_DIR%"
+set "CUDA_HOME=%CUDA_PATH%"
+
 @rem activate installer env
 call "%CONDA_ROOT_PREFIX%\condabin\conda.bat" activate "%INSTALL_ENV_DIR%" || ( echo. && echo Miniconda hook not found. && goto end )