2 files changed, 3 insertions(+), 1 deletions(-)

M README.md
M src/BaseContext.hs

@@ 26,6 26,8 @@ or:
 
     nix install
 
+Nix >=2.4 with the `nix-command` feature enabled is required.
+
 ## Usage
 
 To scan `PATH` for references and pin them, run

@@ 17,7 17,7 @@ data BaseContext = BaseContext
 establishBaseContext :: GlobalOptions -> IO BaseContext
 establishBaseContext globalOpts = do
   defaultStoreDir <- readProcess "nix"
-                       ["eval", "--raw", "(builtins.storeDir)"]
+                       ["eval", "--raw", "--expr", "builtins.storeDir"]
                        mempty
   pure BaseContext
     { storeDir = fromMaybe defaultStoreDir $ GlobalOptions.storeDir globalOpts