flock: fix evaluation error

Changed files
+1 -1
pkgs
top-level
+1 -1
pkgs/top-level/all-packages.nix
···
flightgear = libsForQt5.callPackage ../games/flightgear { };
-
flock = callPackages ../development/tools/flock { };
+
flock = callPackage ../development/tools/flock { };
freecell-solver = callPackage ../games/freecell-solver { };