diff --git a/.github/workflows/cross.sh b/.github/workflows/cross.sh
index 9d9bff7..f5504dc 100755
--- a/.github/workflows/cross.sh
+++ b/.github/workflows/cross.sh
@@ -19,4 +19,4 @@ echo darwin-flock  ; GOOS=darwin    GOARCH=amd64 go build -tags sqlite3_flock .
 echo darwin-nosys  ; GOOS=darwin    GOARCH=amd64 go build -tags sqlite3_nosys .
 echo linux-nosys   ; GOOS=linux     GOARCH=amd64 go build -tags sqlite3_nosys .
 echo windows-nosys ; GOOS=windows   GOARCH=amd64 go build -tags sqlite3_nosys .
-echo freebsd-nosys ; GOOS=freebsd   GOARCH=amd64 go build -tags sqlite3_nosys .
+echo freebsd-nosys ; GOOS=freebsd   GOARCH=amd64 go build -tags sqlite3_nosys .
\ No newline at end of file
diff --git a/.github/workflows/repro.sh b/.github/workflows/repro.sh
new file mode 100755
index 0000000..290c555
--- /dev/null
+++ b/.github/workflows/repro.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ "$OSTYPE" == "linux"* ]]; then
+  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sdk-20.0-linux.tar.gz"
+  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_116/binaryen-version_116-x86_64-linux.tar.gz"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sdk-20.0-macos.tar.gz"
+  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_116/binaryen-version_116-x86_64-macos.tar.gz"
+elif [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
+  WASI_SDK="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sdk-20.0.m-mingw.tar.gz"
+  BINARYEN="https://github.com/WebAssembly/binaryen/releases/download/version_116/binaryen-version_116-x86_64-windows.tar.gz"
+fi
+
+# Download tools
+mkdir -p tools
+[ -d "tools/wasi-sdk"* ]         || curl -#L "$WASI_SDK" | tar xzC tools &
+[ -d "tools/binaryen-version"* ] || curl -#L "$BINARYEN" | tar xzC tools &
+wait
+
+sqlite3/download.sh   # Download SQLite
+embed/build.sh        # Build WASM
+git diff --exit-code  # Check diffs
\ No newline at end of file
diff --git a/.github/workflows/repro.yml b/.github/workflows/repro.yml
new file mode 100644
index 0000000..80c5758
--- /dev/null
+++ b/.github/workflows/repro.yml
@@ -0,0 +1,21 @@
+name: Reproducible build
+
+on:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        lfs: 'true'
+
+    - name: Set up
+      uses: actions/setup-go@v4
+      with:
+        go-version: stable
+
+    - name: Build
+      run: .github/workflows/repro.sh
diff --git a/embed/build.sh b/embed/build.sh
index 6fb3b0d..a0ece88 100755
--- a/embed/build.sh
+++ b/embed/build.sh
@@ -23,7 +23,7 @@ WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
 
 trap 'rm -f sqlite3.tmp' EXIT
 "$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
-"$BINARYEN/wasm-opt" -g --strip -c -O3 \
+"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
 	sqlite3.tmp -o sqlite3.wasm \
 	--enable-simd --enable-mutable-globals --enable-multivalue \
 	--enable-bulk-memory --enable-reference-types \
diff --git a/embed/sqlite3.wasm b/embed/sqlite3.wasm
index 543ef0d..2276261 100755
Binary files a/embed/sqlite3.wasm and b/embed/sqlite3.wasm differ
diff --git a/sqlite3/download.sh b/sqlite3/download.sh
index fe98a2c..f507358 100755
--- a/sqlite3/download.sh
+++ b/sqlite3/download.sh
@@ -8,7 +8,7 @@ unzip -d . sqlite-amalgamation-*.zip
 mv sqlite-amalgamation-*/sqlite3* .
 rm -rf sqlite-amalgamation-*
 
-cat *.patch | patch --posix
+cat *.patch | patch --no-backup-if-mismatch
 
 mkdir -p ext/
 cd ext/
diff --git a/vfs/tests/mptest/testdata/build.sh b/vfs/tests/mptest/testdata/build.sh
index acf3c2d..6d4e0ee 100755
--- a/vfs/tests/mptest/testdata/build.sh
+++ b/vfs/tests/mptest/testdata/build.sh
@@ -23,7 +23,7 @@ WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
 	-DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION \
 	-D_WASI_EMULATED_GETPID -lwasi-emulated-getpid
 
-"$BINARYEN/wasm-opt" -g --strip -c -O3 \
+"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
 	mptest.wasm -o mptest.tmp \
 	--enable-simd --enable-mutable-globals --enable-multivalue \
 	--enable-bulk-memory --enable-reference-types \
diff --git a/vfs/tests/mptest/testdata/mptest.wasm.bz2 b/vfs/tests/mptest/testdata/mptest.wasm.bz2
index 9edf0d8..36c930d 100644
--- a/vfs/tests/mptest/testdata/mptest.wasm.bz2
+++ b/vfs/tests/mptest/testdata/mptest.wasm.bz2
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:6db7a53d189055287cb4eb79d7360bf82e5b3084018b868ea49e70a1dd43f474
-size 512643
+oid sha256:c7480f2234302b68d205e8a4cb83074aeb25a91c5b1a15f27579eda9eb84f670
+size 513613
diff --git a/vfs/tests/speedtest1/testdata/build.sh b/vfs/tests/speedtest1/testdata/build.sh
index 1c16bfe..f9ee57b 100755
--- a/vfs/tests/speedtest1/testdata/build.sh
+++ b/vfs/tests/speedtest1/testdata/build.sh
@@ -18,7 +18,7 @@ WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
 	-Wl,--import-undefined \
 	-D_HAVE_SQLITE_CONFIG_H
 
-"$BINARYEN/wasm-opt" -g --strip -c -O3 \
+"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
 	speedtest1.wasm -o speedtest1.tmp \
 	--enable-simd --enable-mutable-globals --enable-multivalue \
 	--enable-bulk-memory --enable-reference-types \
diff --git a/vfs/tests/speedtest1/testdata/speedtest1.wasm.bz2 b/vfs/tests/speedtest1/testdata/speedtest1.wasm.bz2
index 136addb..8d6862b 100644
--- a/vfs/tests/speedtest1/testdata/speedtest1.wasm.bz2
+++ b/vfs/tests/speedtest1/testdata/speedtest1.wasm.bz2
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ab2acd50a808d534b516b5e856ad76d15d5d9d390178f27cd5418de832080ae9
-size 526575
+oid sha256:e27252fbac7fdec8464722d84f65ced6e4916b720c39a0213ce0219c20610a63
+size 527531