diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index cf92305..cd7e8eb 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up Rust
         uses: dtolnay/rust-toolchain@nightly
         with:
-          targets: wasm32-wasi
+          targets: wasm32-wasip1
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip build
diff --git a/build.sh b/build.sh
index 27c173a..2f212cb 100755
--- a/build.sh
+++ b/build.sh
@@ -106,7 +106,7 @@ make -C libtrellis-build install
 # https://github.com/rust-lang/compiler-team/issues/574
 cargo build --target-dir prjoxide-build \
   --manifest-path prjoxide-src/libprjoxide/prjoxide/Cargo.toml \
-  --target wasm32-wasi \
+  --target wasm32-wasip1 \
   --release
 
 cargo install --target-dir prjoxide-build \
diff --git a/package-pypi-nexus.sh b/package-pypi-nexus.sh
index 1532cb4..e04363d 100755
--- a/package-pypi-nexus.sh
+++ b/package-pypi-nexus.sh
@@ -5,7 +5,7 @@ PYTHON=${PYTHON:-python}
 cd $(dirname $0)
 
 mkdir -p pypi-nexus/yowasp_nextpnr_nexus/bin/
-cp prjoxide-build/wasm32-wasi/release/prjoxide.wasm \
+cp prjoxide-build/wasm32-wasip1/release/prjoxide.wasm \
    nextpnr-build/nextpnr-nexus.wasm \
    pypi-nexus/yowasp_nextpnr_nexus/
 mkdir -p pypi-nexus/yowasp_nextpnr_nexus/share/nexus