diff --git a/snapcraft_legacy/internal/common.py b/snapcraft_legacy/internal/common.py
index 6017b405..aacd99a5 100644
--- a/snapcraft_legacy/internal/common.py
+++ b/snapcraft_legacy/internal/common.py
@@ -34,14 +34,17 @@ from snaphelpers import SnapConfigOptions, SnapCtlError
 
 from snapcraft_legacy.internal import errors
 
+# Get the path to the Nix store entry for Snapcraft at runtime
+drv = os.path.realpath(__file__).split("/")[3]
+
 SNAPCRAFT_FILES = ["parts", "stage", "prime"]
-_DEFAULT_PLUGINDIR = os.path.join(sys.prefix, "share", "snapcraft", "plugins")
+_DEFAULT_PLUGINDIR = os.path.join(os.sep, "nix", "store", drv, "share", "snapcraft", "plugins")
 _plugindir = _DEFAULT_PLUGINDIR
-_DEFAULT_SCHEMADIR = os.path.join(sys.prefix, "share", "snapcraft", "schema")
+_DEFAULT_SCHEMADIR = os.path.join(os.sep, "nix", "store", drv, "share", "snapcraft", "schema")
 _schemadir = _DEFAULT_SCHEMADIR
-_DEFAULT_EXTENSIONSDIR = os.path.join(sys.prefix, "share", "snapcraft", "extensions")
+_DEFAULT_EXTENSIONSDIR = os.path.join(os.sep, "nix", "store", drv, "share", "snapcraft", "extensions")
 _extensionsdir = _DEFAULT_EXTENSIONSDIR
-_DEFAULT_KEYRINGSDIR = os.path.join(sys.prefix, "share", "snapcraft", "keyrings")
+_DEFAULT_KEYRINGSDIR = os.path.join(os.sep, "nix", "store", drv, "share", "snapcraft", "keyrings")
 _keyringsdir = _DEFAULT_KEYRINGSDIR
 
 _DOCKERENV_FILE = "/.dockerenv"