diff --git a/docs/coding-standards.md b/docs/coding-standards.md
index 31fb96bc48..ec77d103b8 100644
--- a/docs/coding-standards.md
+++ b/docs/coding-standards.md
@@ -14,6 +14,10 @@ For testing rules, see [testing.md](testing.md).
 - **`interface`** over `type` when both work.
 - **No `index.ts` barrel files** that only re-export — they create indirection and circular-dep risk. Import from the source.
 
+## Shell scripts
+
+- Bash scripts always use `#!/usr/bin/env bash`. Never hard-code `/bin/bash` or `/usr/bin/bash`; those paths are not portable to environments such as NixOS.
+
 ## Comments and noise
 
 - Delete any comment where removing it loses zero information. Comments explain _why_, not _what_.
diff --git a/packages/desktop/scripts/dev.sh b/packages/desktop/scripts/dev.sh
index 01f69236c7..bcf233bf48 100755
--- a/packages/desktop/scripts/dev.sh
+++ b/packages/desktop/scripts/dev.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
diff --git a/scripts/dev-app.sh b/scripts/dev-app.sh
index 1f4babf5a4..be9857af65 100755
--- a/scripts/dev-app.sh
+++ b/scripts/dev-app.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
diff --git a/scripts/dev-daemon.sh b/scripts/dev-daemon.sh
index b02a16ca1b..dda30f7a4b 100755
--- a/scripts/dev-daemon.sh
+++ b/scripts/dev-daemon.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
diff --git a/scripts/dev-home.sh b/scripts/dev-home.sh
index 98e5a00c6e..a7cea3e051 100755
--- a/scripts/dev-home.sh
+++ b/scripts/dev-home.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 default_dev_paseo_root() {
   git rev-parse --show-toplevel 2>/dev/null || pwd
diff --git a/scripts/dev.sh b/scripts/dev.sh
index f589a262cd..9e3eb1aea7 100755
--- a/scripts/dev.sh
+++ b/scripts/dev.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 exec npm run dev:server
diff --git a/scripts/paseo-ios-simulator-service.sh b/scripts/paseo-ios-simulator-service.sh
index 517ba2c07c..b908c1de73 100755
--- a/scripts/paseo-ios-simulator-service.sh
+++ b/scripts/paseo-ios-simulator-service.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"