From e4964a7e106b31166b8bffe8e624beb195aa6bd9 Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Mon, 20 Apr 2026 21:13:12 +0000
Subject: [PATCH 1/2] prometheus: Include TestFsType patch

The upstream test TestFsType used a regexp to match filesystem magic
constant names (e.g. EXT4_SUPER_MAGIC) against the string returned by
FsType(). This fails in Nix sandbox builds where the filesystem type
does not match that naming pattern.

The patch (prometheus/prometheus#18519) relaxes the assertion to simply
require a non-zero value for a valid path.
---
 pkgs/by-name/pr/prometheus/package.nix        |  4 +++
 .../prometheus-pr18519-fix-TestFsType.patch   | 25 +++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 pkgs/by-name/pr/prometheus/prometheus-pr18519-fix-TestFsType.patch

diff --git a/pkgs/by-name/pr/prometheus/package.nix b/pkgs/by-name/pr/prometheus/package.nix
index fae4e2500a89..703fbda70fd0 100644
--- a/pkgs/by-name/pr/prometheus/package.nix
+++ b/pkgs/by-name/pr/prometheus/package.nix
@@ -92,6 +92,10 @@ buildGoModule (finalAttrs: {
 
   proxyVendor = true;
 
+  patches = [
+    ./prometheus-pr18519-fix-TestFsType.patch
+  ];
+
   outputs = [
     "out"
     "doc"
diff --git a/pkgs/by-name/pr/prometheus/prometheus-pr18519-fix-TestFsType.patch b/pkgs/by-name/pr/prometheus/prometheus-pr18519-fix-TestFsType.patch
new file mode 100644
index 000000000000..a7ad2c20b32c
--- /dev/null
+++ b/pkgs/by-name/pr/prometheus/prometheus-pr18519-fix-TestFsType.patch
@@ -0,0 +1,25 @@
+--- a/util/runtime/statfs_unix_test.go
++++ b/util/runtime/statfs_unix_test.go
+@@ -19,20 +19,18 @@ import (
+ 	"os"
+ 	"testing"
+
+-	"github.com/grafana/regexp"
+ 	"github.com/stretchr/testify/require"
+ )
+
+-var regexpFsType = regexp.MustCompile("^[A-Z][A-Z0-9_]*_MAGIC$")
+-
+ func TestFsType(t *testing.T) {
+ 	var fsType string
+
+ 	path, err := os.Getwd()
+ 	require.NoError(t, err)
+
++	// A real path must yield a non-zero filesystem type.
+ 	fsType = FsType(path)
+-	require.Regexp(t, regexpFsType, fsType)
++	require.NotEqual(t, "0", fsType)
+
+ 	fsType = FsType("/no/where/to/be/found")
+ 	require.Equal(t, "0", fsType)

From 444fdee5efa8deb141c50c431208e8df29c853ae Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Mon, 20 Apr 2026 21:14:17 +0000
Subject: [PATCH 2/2] prometheus: Allow local networking on Darwin for assets
 build

The npm test suite performs a localhost DNS lookup which fails in the
Darwin sandbox without this.
---
 pkgs/by-name/pr/prometheus/package.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/by-name/pr/prometheus/package.nix b/pkgs/by-name/pr/prometheus/package.nix
index 703fbda70fd0..40cfe2fec8f0 100644
--- a/pkgs/by-name/pr/prometheus/package.nix
+++ b/pkgs/by-name/pr/prometheus/package.nix
@@ -63,6 +63,8 @@ let
 
     env.CI = true;
 
+    __darwinAllowLocalNetworking = true;
+
     doCheck = true;
     checkPhase = ''
       runHook preCheck