diff --git a/install_test_pypi.sh b/install_test_pypi.sh
index d35566db..9afa487f 100755
--- a/install_test_pypi.sh
+++ b/install_test_pypi.sh
@@ -29,6 +29,7 @@ set -x
 set -e
 
 pip3 install \
+        --upgrade \
 	--index-url https://test.pypi.org/simple/ \
 	--extra-index-url https://pypi.org/simple/ \
 	klayout-pex
diff --git a/klayout_pex/kpex_cli.py b/klayout_pex/kpex_cli.py
index f9cfa91f..b2f8bc81 100755
--- a/klayout_pex/kpex_cli.py
+++ b/klayout_pex/kpex_cli.py
@@ -98,11 +98,12 @@ class PDK(StrEnum):
     def config(self) -> PDKConfig:
         # NOTE: installation paths of resources in the distribution wheel differes from source repo
         base_dir = os.path.dirname(os.path.realpath(__file__))
-        tech_pb_json_dir = base_dir
         if os.path.isdir(os.path.join(base_dir, '..', '.git')): # in source repo
             base_dir = os.path.dirname(base_dir)
             tech_pb_json_dir = os.path.join(base_dir, 'build')
-
+        else:  # site-packages/klayout_pex -> site-packages/klayout_pex_protobuf
+            tech_pb_json_dir = os.path.join(os.path.dirname(base_dir), 'klayout_pex_protobuf')
+        
         match self:
             case PDK.IHP_SG13G2:
                 return PDKConfig(
@@ -389,7 +390,6 @@ def input_file_stem(path: str):
 
         # at least one engine must be activated
 
-        print("m#äh")
         if not (args.run_magic or args.run_fastcap or args.run_fastercap or args.run_2_5D):
             error("No PEX engines activated")
             engine_help = """
diff --git a/klayout_pex/version.py b/klayout_pex/version.py
index 1f9546af..a1958bab 100644
--- a/klayout_pex/version.py
+++ b/klayout_pex/version.py
@@ -21,4 +21,4 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # --------------------------------------------------------------------------------
 #
-__version__ = "0.1.4"
+__version__ = "0.1.6"
diff --git a/pyproject.toml b/pyproject.toml
index 6f500cd7..75bce7e1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "klayout-pex"
-version = "0.1.4"
+version = "0.1.6"
 description = "Parasitic Extraction Tool for KLayout"
 authors = ["Martin Köhler <info@martinjankoehler.com>"]
 homepage = "https://martinjankoehler.github.io/klayout-pex-website/"