diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index cf3f46b..df6e725 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -55,7 +55,7 @@ jobs:
       if: matrix.os == 'macos-latest'
 
     - name: Coverage report
-      uses: ncruces/go-coverage-report@main
+      uses: ncruces/go-coverage-report@v0
       with:
         chart: 'true'
         amend: 'true'
diff --git a/embed/README.md b/embed/README.md
index 8003043..ab23672 100644
--- a/embed/README.md
+++ b/embed/README.md
@@ -19,4 +19,5 @@ The following optional features are compiled in:
 
 See the [configuration options](../sqlite3/sqlite_cfg.h).
 
-Built using [`zig`](https://ziglang.org/) version 0.10.1.
\ No newline at end of file
+Built using [`wasi-sdk`](https://github.com/WebAssembly/wasi-sdk),
+and [`binaryen`](https://github.com/WebAssembly/binaryen).
\ No newline at end of file
diff --git a/embed/build.sh b/embed/build.sh
index a099c31..139b32d 100755
--- a/embed/build.sh
+++ b/embed/build.sh
@@ -1,18 +1,28 @@
 #!/usr/bin/env bash
-set -eo pipefail
+set -euo pipefail
 
 cd -P -- "$(dirname -- "$0")"
 
-zig cc --target=wasm32-wasi -flto -g0 -O2 \
-  -o sqlite3.wasm ../sqlite3/main.c \
-	-I../sqlite3/ \
+ROOT=../
+BINARYEN="$ROOT/tools/binaryen-version_112/bin"
+WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
+
+"$WASI_SDK/clang" --target=wasm32-wasi -flto -g0 -O2 \
+	-o sqlite3.wasm "$ROOT/sqlite3/main.c" \
+	-I"$ROOT/sqlite3" \
+	-mexec-model=reactor \
 	-mmutable-globals \
 	-mbulk-memory -mreference-types \
 	-mnontrapping-fptoint -msign-ext \
-	-mexec-model=reactor \
+	-Wl,--initial-memory=327680 \
+	-Wl,--stack-first \
+	-Wl,--import-undefined \
 	-D_HAVE_SQLITE_CONFIG_H \
 	$(awk '{print "-Wl,--export="$0}' exports.txt)
 
 trap 'rm -f sqlite3.tmp' EXIT
-wasm-ctor-eval -g -c _initialize sqlite3.wasm -o sqlite3.tmp
-wasm-opt -g -O2 sqlite3.tmp -o sqlite3.wasm
\ No newline at end of file
+"$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
+"$BINARYEN/wasm-opt" -g -O2 sqlite3.tmp -o sqlite3.wasm \
+	--enable-multivalue --enable-mutable-globals \
+	--enable-bulk-memory --enable-reference-types \
+	--enable-nontrapping-float-to-int --enable-sign-ext
\ No newline at end of file
diff --git a/embed/sqlite3.wasm b/embed/sqlite3.wasm
index 6c63d81..558de5b 100755
Binary files a/embed/sqlite3.wasm and b/embed/sqlite3.wasm differ
diff --git a/internal/vfs/tests/mptest/testdata/build.sh b/internal/vfs/tests/mptest/testdata/build.sh
index b942ddb..d039de4 100755
--- a/internal/vfs/tests/mptest/testdata/build.sh
+++ b/internal/vfs/tests/mptest/testdata/build.sh
@@ -1,17 +1,29 @@
 #!/usr/bin/env bash
-set -eo pipefail
+set -euo pipefail
 
 cd -P -- "$(dirname -- "$0")"
 
-zig cc --target=wasm32-wasi -flto -g0 -O2 \
+ROOT=../../../../../
+BINARYEN="$ROOT/tools/binaryen-version_112/bin"
+WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
+
+"$WASI_SDK/clang" --target=wasm32-wasi -flto -g0 -O2 \
   -o mptest.wasm main.c \
-	-I../../../../../sqlite3/ \
+	-I"$ROOT/sqlite3" \
 	-mmutable-globals \
 	-mbulk-memory -mreference-types \
 	-mnontrapping-fptoint -msign-ext \
+	-Wl,--stack-first \
+	-Wl,--import-undefined \
 	-D_HAVE_SQLITE_CONFIG_H \
 	-DSQLITE_DEFAULT_SYNCHRONOUS=0 \
 	-DSQLITE_DEFAULT_LOCKING_MODE=0 \
 	-DHAVE_USLEEP -DSQLITE_NO_SYNC \
 	-DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION \
-	-D_WASI_EMULATED_GETPID -lwasi-emulated-getpid
\ No newline at end of file
+	-D_WASI_EMULATED_GETPID -lwasi-emulated-getpid
+
+"$BINARYEN/wasm-opt" -g -O2 mptest.wasm -o mptest.tmp \
+	--enable-multivalue --enable-mutable-globals \
+	--enable-bulk-memory --enable-reference-types \
+	--enable-nontrapping-float-to-int --enable-sign-ext
+mv mptest.tmp mptest.wasm
\ No newline at end of file
diff --git a/internal/vfs/tests/mptest/testdata/main.c b/internal/vfs/tests/mptest/testdata/main.c
index 27239ab..60485e8 100644
--- a/internal/vfs/tests/mptest/testdata/main.c
+++ b/internal/vfs/tests/mptest/testdata/main.c
@@ -4,7 +4,6 @@
 #include "sqlite3.c"
 //
 #include "os.c"
-#include "qsort.c"
 
 sqlite3_destructor_type malloc_destructor = &free;
 size_t sqlite3_interrupt_offset = offsetof(sqlite3, u1.isInterrupted);
diff --git a/internal/vfs/tests/mptest/testdata/mptest.wasm b/internal/vfs/tests/mptest/testdata/mptest.wasm
old mode 100755
new mode 100644
index f99ea0a..25ad9c8
--- a/internal/vfs/tests/mptest/testdata/mptest.wasm
+++ b/internal/vfs/tests/mptest/testdata/mptest.wasm
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:21efc4fb06ac7a3316634f438c51b66c93b1e75b70a850eb3acd6ff8c1c64b3d
-size 1630624
+oid sha256:37ceeed293b9f09e9770b40eda3f625447f5a3a74208709886d4411d12f93414
+size 1486113
diff --git a/internal/vfs/tests/speedtest1/testdata/build.sh b/internal/vfs/tests/speedtest1/testdata/build.sh
index 94e0a72..f878664 100755
--- a/internal/vfs/tests/speedtest1/testdata/build.sh
+++ b/internal/vfs/tests/speedtest1/testdata/build.sh
@@ -1,12 +1,24 @@
 #!/usr/bin/env bash
-set -eo pipefail
+set -euo pipefail
 
 cd -P -- "$(dirname -- "$0")"
 
-zig cc --target=wasm32-wasi -flto -g0 -O2 \
-  -o speedtest1.wasm main.c \
-	-I../../../../../sqlite3/ \
+ROOT=../../../../../
+BINARYEN="$ROOT/tools/binaryen-version_112/bin"
+WASI_SDK="$ROOT/tools/wasi-sdk-20.0/bin"
+
+"$WASI_SDK/clang" --target=wasm32-wasi -flto -g0 -O2 \
+	-o speedtest1.wasm main.c \
+	-I"$ROOT/sqlite3" \
 	-mmutable-globals \
 	-mbulk-memory -mreference-types \
 	-mnontrapping-fptoint -msign-ext \
-	-D_HAVE_SQLITE_CONFIG_H
\ No newline at end of file
+	-Wl,--stack-first \
+	-Wl,--import-undefined \
+	-D_HAVE_SQLITE_CONFIG_H
+
+"$BINARYEN/wasm-opt" -g -O2 speedtest1.wasm -o speedtest1.tmp \
+	--enable-multivalue --enable-mutable-globals \
+	--enable-bulk-memory --enable-reference-types \
+	--enable-nontrapping-float-to-int --enable-sign-ext
+mv speedtest1.tmp speedtest1.wasm
\ No newline at end of file
diff --git a/internal/vfs/tests/speedtest1/testdata/main.c b/internal/vfs/tests/speedtest1/testdata/main.c
index 833dd82..9bd0d86 100644
--- a/internal/vfs/tests/speedtest1/testdata/main.c
+++ b/internal/vfs/tests/speedtest1/testdata/main.c
@@ -4,7 +4,6 @@
 #include "sqlite3.c"
 //
 #include "os.c"
-#include "qsort.c"
 
 sqlite3_destructor_type malloc_destructor = &free;
 size_t sqlite3_interrupt_offset = offsetof(sqlite3, u1.isInterrupted);
diff --git a/internal/vfs/tests/speedtest1/testdata/speedtest1.wasm b/internal/vfs/tests/speedtest1/testdata/speedtest1.wasm
old mode 100755
new mode 100644
index a29d3ae..9dc2c98
--- a/internal/vfs/tests/speedtest1/testdata/speedtest1.wasm
+++ b/internal/vfs/tests/speedtest1/testdata/speedtest1.wasm
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b3ce4ed200234ac50126a5562fd95a84843898e73e0724687153f9ae458b8a3b
-size 1675943
+oid sha256:8167119c344a68217b0301e2e8c288f2e75611d296d7822f841b65911da0275c
+size 1520569
diff --git a/module_test.go b/module_test.go
index de64b12..32a55ea 100644
--- a/module_test.go
+++ b/module_test.go
@@ -49,14 +49,18 @@ func TestConn_new(t *testing.T) {
 	}
 	defer m.close()
 
-	testOOM := func(size uint64) {
+	t.Run("MaxUint32", func(t *testing.T) {
 		defer func() { _ = recover() }()
-		m.new(size)
+		m.new(math.MaxUint32)
 		t.Error("want panic")
-	}
+	})
 
-	testOOM(math.MaxUint32)
-	testOOM(_MAX_ALLOCATION_SIZE)
+	t.Run("_MAX_ALLOCATION_SIZE", func(t *testing.T) {
+		defer func() { _ = recover() }()
+		m.new(_MAX_ALLOCATION_SIZE)
+		m.new(_MAX_ALLOCATION_SIZE)
+		t.Error("want panic")
+	})
 }
 
 func TestConn_newArena(t *testing.T) {
diff --git a/sqlite3/download.sh b/sqlite3/download.sh
index 3797447..6106f50 100755
--- a/sqlite3/download.sh
+++ b/sqlite3/download.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -eo pipefail
+set -euo pipefail
 
 cd -P -- "$(dirname -- "$0")"
 
@@ -17,7 +17,7 @@ curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/ext/misc/regexp.c
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/ext/misc/series.c"
 cd ~-
 
-cd ../tests/mptest/testdata/
+cd ../internal/vfs/tests/mptest/testdata/
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/mptest/mptest.c"
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/mptest/config01.test"
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/mptest/config02.test"
@@ -26,6 +26,6 @@ curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/mptest/crash02.su
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/mptest/multiwrite01.test"
 cd ~-
 
-cd ../tests/speedtest1/testdata/
+cd ../internal/vfs/tests/speedtest1/testdata/
 curl -#OL "https://github.com/sqlite/sqlite/raw/version-3.41.2/test/speedtest1.c"
 cd ~-
\ No newline at end of file
diff --git a/sqlite3/format.sh b/sqlite3/format.sh
index c65cbc6..4f4621d 100755
--- a/sqlite3/format.sh
+++ b/sqlite3/format.sh
@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
+set -euo pipefail
+
 cd -P -- "$(dirname -- "$0")"
 
 shopt -s extglob
diff --git a/sqlite3/main.c b/sqlite3/main.c
index a1fa15d..db47536 100644
--- a/sqlite3/main.c
+++ b/sqlite3/main.c
@@ -4,7 +4,6 @@
 #include "sqlite3.c"
 //
 #include "os.c"
-#include "qsort.c"
 //
 #include "ext/base64.c"
 #include "ext/decimal.c"
diff --git a/sqlite3/qsort.c b/sqlite3/qsort.c
deleted file mode 100644
index 129af1e..0000000
--- a/sqlite3/qsort.c
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <stddef.h>
-
-void qsort_r(void *, size_t, size_t,
-             int (*)(const void *, const void *, void *), void *);
-
-typedef int (*cmpfun)(const void *, const void *);
-
-static int wrapper_cmp(const void *v1, const void *v2, void *cmp) {
-  return ((cmpfun)cmp)(v1, v2);
-}
-
-void qsort(void *base, size_t nel, size_t width, cmpfun cmp) {
-  qsort_r(base, nel, width, wrapper_cmp, cmp);
-}
\ No newline at end of file