diff --git a/.github/workflows/packages.yml b/.github/workflows/packages.yml
index 6461c61..33c02a3 100644
--- a/.github/workflows/packages.yml
+++ b/.github/workflows/packages.yml
@@ -699,6 +699,40 @@ jobs:
       - name: Test
         working-directory: curve25519-voi
         run: go test ./...
+  oasisprotocol-deoxysii:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@37335c7bb261b353407cff977110895fa0b4f7d8 # v2.1.3
+        with:
+          go-version: 1.18.x
+      - name: Checkout avo
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # v2.3.4
+        with:
+          path: avo
+          persist-credentials: false
+      - name: Checkout oasisprotocol/deoxysii
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # v2.3.4
+        with:
+          repository: oasisprotocol/deoxysii
+          ref: 2091330c22b71dd4e04e15306498e68f3a1b3afc
+          path: deoxysii
+          persist-credentials: false
+      - name: Avo Module Replacement
+        working-directory: deoxysii/internal/hardware/asm
+        run: |
+          go mod edit -modfile=go.mod -require=github.com/mmcloughlin/avo@v0.0.0-00010101000000-000000000000
+          go mod edit -modfile=go.mod -replace=github.com/mmcloughlin/avo=${{ github.workspace }}/avo
+          go mod tidy -modfile=go.mod
+      - name: Generate
+        working-directory: deoxysii/internal/hardware/asm
+        run: bash -ex gen.sh
+      - name: Diff
+        working-directory: deoxysii
+        run: git diff
+      - name: Test
+        working-directory: deoxysii
+        run: go test ./...
   golang-crypto-curve25519:
     runs-on: ubuntu-latest
     steps:
diff --git a/tests/thirdparty/packages.json b/tests/thirdparty/packages.json
index 623c363..e48948e 100644
--- a/tests/thirdparty/packages.json
+++ b/tests/thirdparty/packages.json
@@ -128,7 +128,7 @@
         },
         "metadata": {
             "description": "Pure Go implementation of BLAKE3 with AVX2 and SSE4.1 acceleration",
-            "stars": 287
+            "stars": 288
         },
         "default_branch": "master",
         "version": "25dba572f0e78ec108f0dd79c9c15288f542d7d9",
@@ -150,7 +150,7 @@
         },
         "metadata": {
             "description": "Reed-Solomon Erasure Coding in Go",
-            "stars": 1424
+            "stars": 1428
         },
         "default_branch": "master",
         "version": "922778284547557265cff0f903ab5f4c27e40ae9",
@@ -201,7 +201,7 @@
         },
         "metadata": {
             "description": "Optimized Go Compression Packages",
-            "stars": 2693
+            "stars": 2701
         },
         "default_branch": "master",
         "version": "2adf487b3e02f95ce7efd6e4953fda0ae7ecd080",
@@ -447,7 +447,7 @@
         },
         "metadata": {
             "description": "Go library providing algorithms optimized to leverage the characteristics of modern CPUs",
-            "stars": 679
+            "stars": 681
         },
         "default_branch": "main",
         "version": "2bf3fdd47b1cdbe8fe020f032caf14891e10a85f",
@@ -513,7 +513,7 @@
         },
         "metadata": {
             "description": "High-performance Curve25519/ristretto255 for Go",
-            "stars": 43
+            "stars": 45
         },
         "default_branch": "master",
         "version": "d5a936accd94ef9da4c0fe9db0a6342dcdcfeadf",
@@ -527,6 +527,27 @@
             }
         ]
     },
+    {
+        "repository": {
+            "owner": "oasisprotocol",
+            "name": "deoxysii"
+        },
+        "metadata": {
+            "description": "Go Deoxys-II-256-128",
+            "stars": 17
+        },
+        "default_branch": "master",
+        "version": "2091330c22b71dd4e04e15306498e68f3a1b3afc",
+        "module": "internal/hardware/asm/go.mod",
+        "generate": [
+            {
+                "dir": "internal/hardware/asm",
+                "commands": [
+                    "bash -ex gen.sh"
+                ]
+            }
+        ]
+    },
     {
         "repository": {
             "owner": "golang",
@@ -535,7 +556,7 @@
         "metadata": {
             "description": "[mirror] Go supplementary cryptography libraries",
             "homepage": "https://golang.org/x/crypto",
-            "stars": 2385
+            "stars": 2391
         },
         "default_branch": "master",
         "version": "089bfa5675191fd96a44247682f76ebca03d7916",