diff --git a/kiwi_scp/scripts/kiwi.py b/kiwi_scp/scripts/kiwi.py
index 6f96b5d..ac9dc9e 100644
--- a/kiwi_scp/scripts/kiwi.py
+++ b/kiwi_scp/scripts/kiwi.py
@@ -18,7 +18,7 @@ def main(verbose: int) -> None:
     - Manage full instances using just your favorite version control system
     - Group services into projects, each with their own docker-compose.yml
     - Build service-specific, private docker images from Dockerfiles
-    - Make use of the local file system by referring to ${TARGETDIR}, ${TARGETROOT} and ${CONFIGDIR} in compose files
+    - Make use of the local file system by referring to ${KIWI_PROJECT}, ${KIWI_INSTANCE} and ${KIWI_CONFIG} in compose files
     - Create your own instance-global variables for compose files using the kiwi.yml "environment" section
     """
 
diff --git a/kiwi_scp/service.py b/kiwi_scp/service.py
index 220aa63..893f387 100644
--- a/kiwi_scp/service.py
+++ b/kiwi_scp/service.py
@@ -22,7 +22,7 @@ class Service:
     content: CommentedMap = attr.ib()
     parent_project: "Project" = attr.ib()
 
-    _RE_CONFIGDIR = re.compile(r"^\s*\$(?:CONFIGDIR|{CONFIGDIR})/+(.*)$", flags=re.UNICODE)
+    _RE_KIWI_CONFIG = re.compile(r"^\s*\$(?:KIWI_CONFIG|{KIWI_CONFIG})/+(.*)$", flags=re.UNICODE)
 
     @property
     def configs(self) -> Generator[Path, None, None]:
@@ -31,7 +31,7 @@ class Service:
 
         for volume in self.content["volumes"]:
             host_part = volume.split(":")[0]
-            cd_match = Service._RE_CONFIGDIR.match(host_part)
+            cd_match = Service._RE_KIWI_CONFIG.match(host_part)
 
             if cd_match:
                 yield Path(cd_match.group(1))
diff --git a/tests/test_service.py b/tests/test_service.py
index 064edad..d172f06 100644
--- a/tests/test_service.py
+++ b/tests/test_service.py
@@ -35,8 +35,8 @@ class TestDefault:
                 "image": "repo/image:tag",
                 "volumes": [
                     "docker_volume/third/dir:/path/to/third/mountpoint",
-                    "${TARGETDIR}/some/dir:/path/to/some/mountpoint",
-                    "$TARGETDIR/other/dir:/path/to/other/mountpoint",
+                    "${KIWI_PROJECT}/some/dir:/path/to/some/mountpoint",
+                    "$KIWI_PROJECT/other/dir:/path/to/other/mountpoint",
                 ]
             }),
             parent_project=None,
@@ -51,8 +51,8 @@ class TestDefault:
             content=CommentedMap({
                 "image": "repo/image:tag",
                 "volumes": [
-                    "${CONFIGDIR}/some/config:/path/to/some/config",
-                    "$CONFIGDIR/other/config:/path/to/other/config",
+                    "${KIWI_CONFIG}/some/config:/path/to/some/config",
+                    "$KIWI_CONFIG/other/config:/path/to/other/config",
                 ]
             }),
             parent_project=None,