diff --git a/krebs/3modules/ci.nix b/krebs/3modules/ci.nix
index d8d0e7f3d..bbc58361d 100644
--- a/krebs/3modules/ci.nix
+++ b/krebs/3modules/ci.nix
@@ -27,9 +27,9 @@ let
   hostname = config.networking.hostName;
   getJobs = pkgs.writeDash "get_jobs" ''
     set -efu
-    nix-build --no-out-link --quiet -Q ./ci.nix > /dev/null
-    js="$(nix-instantiate --quiet -Q --eval --strict --json ./ci.nix)"
-    echo "$js" | jq -r 'to_entries[] | [.key, .value] | @tsv' \
+    ${pkgs.nix}/bin/nix-build --no-out-link --quiet -Q ./ci.nix > /dev/null
+    js="$(${pkgs.nix}/bin/nix-instantiate --quiet -Q --eval --strict --json ./ci.nix)"
+    echo "$js" | ${pkgs.jq}/bin/jq -r 'to_entries[] | [.key, .value] | @tsv' \
       | while read -r host builder; do
         gcroot=${shell.escape profileRoot}/$host-builder
         ${pkgs.nix}/bin/nix-env -p "$gcroot" --set "$builder"