diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a03c842..8a98069 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -55,7 +55,7 @@ jobs:
           authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
 
       - name: Run loadtest
-        run: nix-shell --run "./bench/loadtest.sh ${{ matrix.kind }}"
+        run: nix-shell --run "./bench/loadtest.sh ${{ matrix.kind }}" >> "$GITHUB_STEP_SUMMARY"
 
   coverage:
 
diff --git a/shell.nix b/shell.nix
index d3d41cf..86f87f3 100644
--- a/shell.nix
+++ b/shell.nix
@@ -6,11 +6,10 @@ with import (builtins.fetchTarball {
 mkShell {
   buildInputs =
     let
-      xpg = import (fetchFromGitHub {
-      owner  = "steve-chavez";
+    xpg = import (fetchFromGitHub { owner  = "steve-chavez";
       repo   = "xpg";
-      rev    = "v1.5.0";
-      sha256 = "sha256-Ja7pa6RoJ4Bxa0/lb6G/X3RdUYSaomqeEO+ZfsHHGqQ=";
+      rev    = "v1.5.2";
+      sha256 = "sha256-NwhOi/BAZX0JdtFhtV3wgjagNTO5Kmq2Oy3sa+GyDv8=";
     });
     style =
       writeShellScriptBin "pg_csv-style" ''