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Fix build error when aliasing typescript to @typescript/typescript6 - #97942

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mischnic merged 3 commits into
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fix/typescript-alias-cli-detection
Aug 27, 2026
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Fix build error when aliasing typescript to @typescript/typescript6#97942
mischnic merged 3 commits into
canaryfrom
fix/typescript-alias-cli-detection

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@mischnic

@mischnic mischnic commented Aug 26, 2026 •
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This was previously broken, because the binary isn't called tsc but tsc6:

"dependencies": {
	"typescript": "npm:@typescript/typescript6@6.0.1"
}

@vercel-fleet-prod @mischnic
Fix aliased TypeScript CLI detection
ab346e9 
Co-authored-by: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>
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Stats from current PR

🔴 1 regression

Metric Canary PR Change Trend
Webpack Build Time (cached) 24.521s 25.556s 🔴 +1.035s (+4%) ▁▁▂▁█
📊 All Metrics
📖 Metrics Glossary

Dev Server Metrics:

  • Listen = TCP port starts accepting connections
  • First Request = HTTP server returns successful response
  • Cold = Fresh build (no cache)
  • Warm = With cached build artifacts

Build Metrics:

  • Fresh = Clean build (no .next directory)
  • Cached = With existing .next directory

Change Thresholds:

  • Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
  • Size: Changes < 1KB AND < 1% are insignificant
  • All other changes are flagged to catch regressions

⚡ Dev Server

Metric Canary PR Change Trend
Cold (Listen) 814ms 812ms ✓ ▂▂▂▂█
Cold (Ready in log) 811ms 800ms ✓ ▁▁▁▁█
Cold (First Request) 1.305s 1.269s ✓ ▁▁▁▁█
Warm (Listen) 814ms 812ms ✓ ▂▁▂▂█
Warm (Ready in log) 801ms 799ms ✓ ▁▁▁▁█
Warm (First Request) 1.282s 1.267s ✓ ▁▁▁▁█
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 815ms 864ms ✓ ▁▁▁▁█
Cold (Ready in log) 818ms 832ms ✓ ▁▁▂▁█
Cold (First Request) 3.485s 3.475s ✓ ▂▁▂▁█
Warm (Listen) 863ms 863ms ✓ ▁▁▁▁▇
Warm (Ready in log) 825ms 826ms ✓ ▁▁▂▁█
Warm (First Request) 3.502s 3.470s ✓ ▁▁▂▁█

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 6.026s 5.961s ✓ ▁▁▁▂█
Cached Build 2.924s 2.949s ✓ ▁▁▁▁█
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 25.411s 25.458s ✓ ▁▁▂▁█
Cached Build 24.521s 25.556s 🔴 +1.035s (+4%) ▁▁▂▁█
node_modules Size 557 MB 557 MB ✓ █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles
Canary PR Change
017_4moyv5m34.js gzip 117 B 117 B ✓
05jocc85-b73_.js gzip 341 B N/A -
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0skdm-9rpid8g.js gzip N/A 117 B -
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Total 299 kB 299 kB ⚠️ +3 B

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 1.02 kB 1.03 kB ✓
Total 1.02 kB 1.03 kB ⚠️ +2 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 846 B 847 B ✓
Total 846 B 847 B ⚠️ +1 B
Build Cache
Canary PR Change
00000001.sst gzip 14.1 MB 12.7 MB 🟢 1.4 MB (-10%)
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00000020.sst gzip 59 B 59 B ✓
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LOG gzip 661 B 680 B 🔴 +19 B (+3%)
Total 79.6 MB 79.7 MB ⚠️ +63 kB

📦 Webpack

Client

Main Bundles
Canary PR Change
3322-HASH.js gzip 65.7 kB N/A -
4191.HASH.js gzip 169 B N/A -
9784-HASH.js gzip 5.6 kB N/A -
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578-HASH.js gzip N/A 65.8 kB -
8590-HASH.js gzip N/A 5.57 kB -
a8984546-HASH.js gzip N/A 63.5 kB -
Total 236 kB 237 kB ⚠️ +106 B
Polyfills
Canary PR Change
polyfills-HASH.js gzip 39.4 kB 39.4 kB ✓
Total 39.4 kB 39.4 kB ✓
Pages
Canary PR Change
_app-HASH.js gzip 194 B 193 B ✓
_error-HASH.js gzip 181 B 182 B ✓
css-HASH.js gzip 334 B 331 B ✓
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Total 12.4 kB 12.4 kB ✅ -6 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 128 kB 128 kB ✓
page.js gzip 293 kB 293 kB ✓
Total 421 kB 421 kB ✅ -492 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 600 B 601 B ✓
middleware-r..fest.js gzip 156 B 156 B ✓
middleware.js gzip 45.6 kB 45.4 kB ✓
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Total 47.2 kB 47 kB ✅ -170 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 699 B 699 B ✓
Total 699 B 699 B ✓
Build Cache
Canary PR Change
0.pack gzip 4.8 MB 4.8 MB 🟢 5.57 kB (0%)
index.pack gzip 123 kB 124 kB ✓
index.pack.old gzip 124 kB 122 kB 🟢 1.27 kB (-1%)
Total 5.05 MB 5.04 MB ✅ -6.12 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 375 kB 375 kB ✓
app-page-exp..prod.js gzip 206 kB 206 kB ✓
app-page-tur...dev.js gzip 374 kB 374 kB ✓
app-page-tur..prod.js gzip 206 kB 206 kB ✓
app-page-tur...dev.js gzip 371 kB 371 kB ✓
app-page-tur..prod.js gzip 204 kB 204 kB ✓
app-page.run...dev.js gzip 371 kB 371 kB ✓
app-page.run..prod.js gzip 204 kB 204 kB ✓
app-route-ex...dev.js gzip 82.9 kB 82.9 kB ✓
app-route-ex..prod.js gzip 55.8 kB 55.8 kB ✓
app-route-tu...dev.js gzip 82.9 kB 82.9 kB ✓
app-route-tu..prod.js gzip 55.9 kB 55.9 kB ✓
app-route-tu...dev.js gzip 82.5 kB 82.5 kB ✓
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dev-validati...dev.js gzip 132 kB 132 kB ✓
dev-validati...dev.js gzip 132 kB 132 kB ✓
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dist_client_...dev.js gzip 317 B 317 B ✓
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pages-api.ru..prod.js gzip 34.3 kB 34.3 kB ✓
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server.runti..prod.js gzip 66 kB 66 kB ✓
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use-cache-pr...dev.js gzip 73.4 kB 73.4 kB ✓
use-cache-pr...dev.js gzip 71.7 kB 71.7 kB ✓
use-cache-pr...dev.js gzip 71.6 kB 71.6 kB ✓
Total 4.1 MB 4.1 MB ✅ -5 B
📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/5a08df37c75c2f67e021c6d492a30e558b96ed05/next

Commit: 5a08df3

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github-actions Bot commented Aug 26, 2026 •
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Tests Passed

Commit: 79b6b9c

@vercel-fleet-prod @mischnic
Test aliased TypeScript CLI package
5a08df3 
Co-authored-by: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>
@mischnic
mischnic requested review from a team and timneutkens August 26, 2026 19:23
@mischnic
mischnic merged commit d75bf1b into canary Aug 27, 2026
131 checks passed
@mischnic
mischnic deleted the fix/typescript-alias-cli-detection branch August 27, 2026 07:49
@mischnic mischnic mentioned this pull request Aug 27, 2026
Merged
lukesandberg pushed a commit that referenced this pull request Aug 28, 2026
@mischnic @vercel-fleet-prod
[16.3.x] Fix build error when aliasing typescript to @typescript/type…
d8f4560 
…script6 (#97997)

Backport #97942

Co-authored-by: vercel-fleet-prod[bot] <318278635+vercel-fleet-prod[bot]@users.noreply.github.com>
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