diff --git a/package.json b/package.json
index 93f44e0a3..14534ce51 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,6 @@
     "globals": "^16.5.0",
     "js-yaml": "^5.2.2",
     "knip": "^6.23.0",
-    "minimatch": "^10.0.0",
     "nx": "^22.0.0",
     "oxfmt": "^0.59.0",
     "oxlint": "^1.51.0",
diff --git a/scripts/affected.ts b/scripts/affected.ts
index 2450a4566..0405af9dc 100644
--- a/scripts/affected.ts
+++ b/scripts/affected.ts
@@ -1,7 +1,7 @@
 import { getBaseCommit, getChangedFiles, git } from "@rnx-kit/tools-git";
 import * as yaml from "js-yaml";
-import { Minimatch } from "minimatch";
 import * as fs from "node:fs";
+import * as path from "node:path";
 
 type MatchChangedFiles = { "any-glob-to-any-file": string[] };
 type Match = { "changed-files": MatchChangedFiles[] };
@@ -21,12 +21,23 @@ function loadLabels(): Record<string, Match[] | undefined> {
   return yaml.load(yml) as Record<string, Match[] | undefined>;
 }
 
+/**
+ * Makes a glob pattern match dotfiles, emulating minimatch's `{ dot: true }`.
+ *
+ * `path.matchesGlob` won't match a path segment that starts with a dot against
+ * `*`/`**`, so we insert an optional dot before every wildcard segment (a `*`
+ * right after a `/`, or at the very start of the pattern).
+ */
+function dotAware(pattern: string): string {
+  const withDot = pattern.replaceAll("/*", "/{.,}*");
+  return withDot.startsWith("*") ? `{.,}${withDot}` : withDot;
+}
+
 /**
  * Makes platform specific file path matchers.
  */
-function makeMatchers(): Record<string, Minimatch[]> {
-  const matchers: Record<string, Minimatch[]> = {};
-  const options = { dot: true };
+function makeMatchers(): Record<string, string[]> {
+  const matchers: Record<string, string[]> = {};
   const labels = loadLabels();
 
   for (const [label, match] of Object.entries(labels)) {
@@ -36,7 +47,7 @@ function makeMatchers(): Record<string, Minimatch[]> {
 
     const patterns = match[0]["changed-files"][0]["any-glob-to-any-file"];
     const platform = label.split(": ")[1];
-    matchers[platform] = patterns.map((m) => new Minimatch(m, options));
+    matchers[platform] = patterns.map(dotAware);
   }
 
   return matchers;
@@ -70,8 +81,8 @@ function getAffectedPlatforms(targetBranch: string | undefined): string[] {
   }
 
   const affectedPlatforms = new Set<string>();
-  for (const [platform, matchers] of Object.entries(platformMatchers)) {
-    if (matchers.some((m) => changedFiles.some((f) => m.match(f)))) {
+  for (const [platform, patterns] of Object.entries(platformMatchers)) {
+    if (patterns.some((p) => changedFiles.some((f) => path.matchesGlob(f, p)))) {
       affectedPlatforms.add(platform);
     }
   }
diff --git a/yarn.lock b/yarn.lock
index dbc16976f..193fcafc2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2508,7 +2508,6 @@ __metadata:
     globals: "npm:^16.5.0"
     js-yaml: "npm:^5.2.2"
     knip: "npm:^6.23.0"
-    minimatch: "npm:^10.0.0"
     nx: "npm:^22.0.0"
     oxfmt: "npm:^0.59.0"
     oxlint: "npm:^1.51.0"
@@ -11675,7 +11674,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"minimatch@npm:^10.0.0, minimatch@npm:^10.0.3, minimatch@npm:^10.1.1, minimatch@npm:^10.2.2, minimatch@npm:^10.2.5":
+"minimatch@npm:^10.0.3, minimatch@npm:^10.1.1, minimatch@npm:^10.2.2, minimatch@npm:^10.2.5":
   version: 10.2.5
   resolution: "minimatch@npm:10.2.5"
   dependencies: