diff --git a/action.yml b/action.yml
index c2cf28e..8efa9a5 100644
--- a/action.yml
+++ b/action.yml
@@ -130,7 +130,7 @@ runs:
         fi
 
         # Create Size Report
-        "$GITHUB_ACTION_PATH/scripts/create-report.sh" > report.json
+        "$GITHUB_ACTION_PATH/scripts/create-report.sh" report.json
 
         # Nothing else to do
         if [ "$COMMENT" != 'true' ]; then exit 0; fi
diff --git a/scripts/create-report.sh b/scripts/create-report.sh
index 26fd732..cfe4209 100755
--- a/scripts/create-report.sh
+++ b/scripts/create-report.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 set -eu
 
@@ -78,4 +78,4 @@ echo "{}" | jq \
   --argjson pkgs "$pkgs" \
   --argjson hmConfigs "$hmConfigs" \
   --argjson nixosConfigs "$nixosConfigs" \
-  '{"packages": $pkgs, "nixosConfigurations": $nixosConfigs, "homeConfigurations": $hmConfigs}'
+  '{"packages": $pkgs, "nixosConfigurations": $nixosConfigs, "homeConfigurations": $hmConfigs}' >"${1:-/dev/stdout}"
diff --git a/scripts/retrieve-old-report.sh b/scripts/retrieve-old-report.sh
index d1ab0f2..9c50afe 100755
--- a/scripts/retrieve-old-report.sh
+++ b/scripts/retrieve-old-report.sh
@@ -74,6 +74,6 @@ curl -X 'GET' \
   tar -zvx --strip-components=1 -C "$old"
 endgroup
 
-(cd "$old" && "$GITHUB_ACTION_PATH/create-report.sh") >old-report.json
+(cd "$old" && "$GITHUB_ACTION_PATH/create-report.sh" old-report.json)
 
 exit 0