diff --git a/tools.nix b/tools.nix
index 7cd1ff4e..e02bb37a 100644
--- a/tools.nix
+++ b/tools.nix
@@ -67,12 +67,12 @@ rec {
 
         crate2nix_options=""
         if [ -r ./${cargoToml} ]; then
-          create2nix_options+=" -f ./${cargoToml}"
+          crate2nix_options+=" -f ./${cargoToml}"
         fi
 
         if test -r "./crate2nix.json" ; then
           cp "./crate2nix.json" "$out/crate2nix.json"
-          create2nix_options+=" -c $out/crate2nix.json"
+          crate2nix_options+=" -c $out/crate2nix.json"
         fi
 
         if test -r "${src}/crate2nix-sources" ; then
@@ -82,7 +82,7 @@ rec {
         set -x
 
         crate2nix generate \
-          $create2nix_options \
+          $crate2nix_options \
           -o "Cargo-generated.nix" \
           -h "$crate_hashes" \
           ${lib.escapeShellArgs additionalCargoNixArgs} || {
@@ -349,7 +349,9 @@ rec {
                 replace-with = "vendored-sources"
               '';
             gitSources = packagesByType."git" or [ ];
-            gitSourcesUnique = lib.unique gitSources;
+            uniqueBy = f:
+              lib.foldl' (acc: e: if lib.elem (f e) (map f acc) then acc else acc ++ [ e ]) [ ];
+            gitSourcesUnique = uniqueBy (c: c.source) gitSources;
             gitSourceConfigs = builtins.map gitSourceConfig gitSourcesUnique;
             gitSourceConfigsString = lib.concatStrings gitSourceConfigs;
           in