diff --git a/README.md b/README.md
index d8f33972..bfb2c796 100644
--- a/README.md
+++ b/README.md
@@ -76,11 +76,12 @@ variant of this application config:
 - `conf/aggregator.dev.py`
 - `conf/aggregator.prod.py`
 
-Which config to pick is determined through env variables:
+Use the env var `OPENEO_AGGREGATOR_CONFIG` to point to the desired config path.
+Currently, the dev config is used as fallback.
 
-- if set, env variable `OPENEO_AGGREGATOR_CONFIG` is the path to the desired config file
-- otherwise, if set, env variable `ENV` must be `dev` or `prod`
-- otherwise, `dev` is used as default
+Also note that these concrete config files will be refactored out of the `openeo-aggregator` repo
+at some point in the future ([#117](https://github.com/Open-EO/openeo-aggregator/issues/117))
+and probably only a dummy default config will be preserved.
 
 ### Logging
 
diff --git a/src/openeo_aggregator/config.py b/src/openeo_aggregator/config.py
index 944d0049..e0dec69c 100644
--- a/src/openeo_aggregator/config.py
+++ b/src/openeo_aggregator/config.py
@@ -11,9 +11,6 @@
 
 OPENEO_AGGREGATOR_CONFIG = "OPENEO_AGGREGATOR_CONFIG"
 
-# TODO: #117 eliminate this (too simple) config handle
-ENVIRONMENT_INDICATOR = "ENV"
-
 CACHE_TTL_DEFAULT = 6 * 60 * 60
 
 # Timeouts for requests to back-ends
@@ -86,27 +83,24 @@ def get_config_dir() -> Path:
     raise RuntimeError("No config dir found")
 
 
-def get_config(x: Any = None) -> AggregatorConfig:
+def get_config(x: Union[str, Path, AggregatorConfig, None] = None) -> AggregatorConfig:
     """
     Get aggregator config from given object:
     - if None: check env variable "OPENEO_AGGREGATOR_CONFIG" or return default config
     - if it is already an `AggregatorConfig` object: return as is
-    - if it is a string: try to parse it as JSON (file)
+    - if it is a string and looks like a path of a Python file: load config from that
     """
-    # TODO #117 simplify this logic: just support direct file references, iso "aggregator.$ENV.py"
 
     if x is None:
-        for env_var in [OPENEO_AGGREGATOR_CONFIG, ENVIRONMENT_INDICATOR]:
-            if env_var in os.environ:
-                x = os.environ[env_var]
-                _log.info(f"Config from env var {env_var}: {x!r}")
-                break
+        if OPENEO_AGGREGATOR_CONFIG in os.environ:
+            x = os.environ[OPENEO_AGGREGATOR_CONFIG]
+            _log.info(f"Config from env var {OPENEO_AGGREGATOR_CONFIG}: {x!r}")
         else:
-            x = "dev"
+            # TODO #117 provide just a very simple default config, instead of a concrete dev one
+            x = get_config_dir() / "aggregator.dev.py"
+            _log.info(f"Config from fallback {x!r}")
 
     if isinstance(x, str):
-        if re.match("^[a-zA-Z]+$", x):
-            x = get_config_dir() / f"aggregator.{x.lower()}.py"
         x = Path(x)
 
     if isinstance(x, AggregatorConfig):
diff --git a/tests/test_config.py b/tests/test_config.py
index d37dacc2..b5c1b76e 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -5,7 +5,6 @@
 import pytest
 
 from openeo_aggregator.config import (
-    ENVIRONMENT_INDICATOR,
     OPENEO_AGGREGATOR_CONFIG,
     STREAM_CHUNK_SIZE_DEFAULT,
     AggregatorConfig,
@@ -48,7 +47,6 @@ def test_config_from_py_file(tmp_path):
 
 def test_get_config_default_no_env():
     assert OPENEO_AGGREGATOR_CONFIG not in os.environ
-    assert ENVIRONMENT_INDICATOR not in os.environ
     config = get_config()
     assert config.config_source.endswith("/conf/aggregator.dev.py")
 
@@ -63,18 +61,6 @@ def test_get_config_py_file_path(tmp_path, convertor):
     assert config.streaming_chunk_size == 123
 
 
-@pytest.mark.parametrize(["value", "expected"], [
-    ("dev", "/conf/aggregator.dev.py"),
-    ("DEV", "/conf/aggregator.dev.py"),
-    ("prod", "/conf/aggregator.prod.py"),
-    ("PROD", "/conf/aggregator.prod.py"),
-])
-def test_get_config_arg(value, expected):
-    with mock.patch.dict(os.environ, {OPENEO_AGGREGATOR_CONFIG: "meh", ENVIRONMENT_INDICATOR: "pft"}):
-        config = get_config(value)
-    assert config.config_source.endswith(expected)
-
-
 def test_get_config_env_py_file(tmp_path):
     path = tmp_path / "aggregator-conf.py"
     path.write_text(CONFIG_PY_EXAMPLE)
@@ -84,25 +70,3 @@ def test_get_config_env_py_file(tmp_path):
     assert config.config_source == str(path)
     assert config.aggregator_backends == {"b1": "https://b1.test"}
     assert config.streaming_chunk_size == 123
-
-
-@pytest.mark.parametrize("env_var", [
-    OPENEO_AGGREGATOR_CONFIG,
-    ENVIRONMENT_INDICATOR,
-])
-@pytest.mark.parametrize("value", ["dev", "DEV"])
-def test_get_config_none_env_dev(env_var, value):
-    with mock.patch.dict(os.environ, {env_var: value}):
-        config = get_config()
-    assert config.config_source.endswith("/conf/aggregator.dev.py")
-
-
-@pytest.mark.parametrize("env_var", [
-    OPENEO_AGGREGATOR_CONFIG,
-    ENVIRONMENT_INDICATOR,
-])
-@pytest.mark.parametrize("value", ["prod", "PROD"])
-def test_get_config_none_env_prod(env_var, value):
-    with mock.patch.dict(os.environ, {env_var: value}):
-        config = get_config()
-    assert config.config_source.endswith("/conf/aggregator.prod.py")