diff --git a/third_party/default.nix b/third_party/default.nix
index 655f35b02..a02b05275 100644
--- a/third_party/default.nix
+++ b/third_party/default.nix
@@ -61,6 +61,7 @@ let
       rustc
       sbcl
       stdenv
+      stern
       symlinkJoin
       terraform_0_12
       tree
diff --git a/tools/bin/__dispatch.sh b/tools/bin/__dispatch.sh
index fb8a4d779..d1d54909c 100755
--- a/tools/bin/__dispatch.sh
+++ b/tools/bin/__dispatch.sh
@@ -6,7 +6,7 @@
 # to the key in nixpkgs which represents the program you want to run.
 set -ueo pipefail
 
-readonly REPO_ROOT=$(git rev-parse --show-toplevel)
+readonly REPO_ROOT=$(dirname $0)/../..
 readonly TARGET_TOOL=$(basename $0)
 
 case "${TARGET_TOOL}" in
@@ -20,9 +20,9 @@ case "${TARGET_TOOL}" in
     attr="tools.blog_cli"
     ;;
   stern)
-    attr="stern"
+    attr="third_party.stern"
     ;;
-  pass)
+  kms_pass)
     attr="tools.kms_pass"
     ;;
   aoc2019)
diff --git a/tools/bin/pass b/tools/bin/kms_pass
similarity index 100%
rename from tools/bin/pass
rename to tools/bin/kms_pass