diff --git a/dist/main/index.js b/dist/main/index.js
index 1cd742ff..633cacba 100644
--- a/dist/main/index.js
+++ b/dist/main/index.js
@@ -7957,14 +7957,14 @@ async function execToVariable(command, args, options) {
 async function registerPostBuildHook(cachixBin, daemonDir) {
     const postBuildHookScriptPath = `${daemonDir}/post-build-hook.sh`;
     await fs.writeFile(postBuildHookScriptPath, `
-    #!/bin/sh
+    #!/usr/bin/env bash
 
     set -eu
     set -f # disable globbing
 
     PUSH_FILTER="${pushFilter}"
 
-    function filterPaths {
+    filterPaths() {
       local regex=$1
       local paths=$2
 
diff --git a/src/main.ts b/src/main.ts
index 0d216377..127f39ab 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -276,14 +276,14 @@ async function execToVariable(command: string, args?: string[], options?: exec.E
 async function registerPostBuildHook(cachixBin: string, daemonDir: string) {
   const postBuildHookScriptPath = `${daemonDir}/post-build-hook.sh`;
   await fs.writeFile(postBuildHookScriptPath, `
-    #!/bin/sh
+    #!/usr/bin/env bash
 
     set -eu
     set -f # disable globbing
 
     PUSH_FILTER="${pushFilter}"
 
-    function filterPaths {
+    filterPaths() {
       local regex=$1
       local paths=$2