diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..f68f33c
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+target = "wasm32-wasip2"
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5f53940..0bce520 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,14 +14,8 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - uses: actions-rust-lang/setup-rust-toolchain@v1
-      with:
-        toolchain: 1.84.1
-        components: rustfmt
-        target: wasm32-unknown-unknown,wasm32-wasip2
     - name: Install cargo binstall
       uses: cargo-bins/cargo-binstall@main
-    - name: Install cargo component
-      run: cargo binstall --force cargo-component
     - name: Install wkg
       run: cargo binstall --force wkg
     - name: Fetch wit
@@ -51,10 +45,6 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - uses: actions-rust-lang/setup-rust-toolchain@v1
-      with:
-        toolchain: 1.84.1
-        components: rustfmt
-        target: wasm32-unknown-unknown
     - name: Install cargo binstall
       uses: cargo-bins/cargo-binstall@main
     - name: Install wkg
diff --git a/Makefile b/Makefile
index 78ccfe5..f13c71e 100644
--- a/Makefile
+++ b/Makefile
@@ -20,13 +20,12 @@ components: $(foreach component,$(COMPONENTS),lib/$(component).wasm $(foreach co
 define BUILD_COMPONENT
 
 lib/$1.wasm: Cargo.toml Cargo.lock wit/deps $(shell find components/$1 -type f)
-	@$(eval TARGET := $(if $(findstring $1,keyvalue-to-filesystem),wasm32-wasip2,wasm32-unknown-unknown))
-	cargo component build -p $1 --target $(TARGET) --release
-	cp target/$(TARGET)/release/$(subst -,_,$1).wasm lib/$1.wasm
+	cargo build -p $1 --release
+	cp target/wasm32-wasip2/release/$(subst -,_,$1).wasm lib/$1.wasm
 	cp components/$1/README.md lib/$1.wasm.md
 
 lib/$1.debug.wasm: Cargo.toml Cargo.lock wit/deps $(shell find components/$1 -type f)
-	cargo component build -p $1 --target wasm32-wasip2
+	cargo build -p $1
 	cp target/wasm32-wasip2/debug/$(subst -,_,$1).wasm lib/$1.debug.wasm
 	cp components/$1/README.md lib/$1.debug.wasm.md
 
diff --git a/README.md b/README.md
index 78d8e5c..7e0f88a 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,7 @@ A collection of utility components that remix wasi:cli types and interfaces.
 ## Build
 
 Prereqs:
-- a rust toolchain with a recent nightly (`rustup toolchain install nightly`)
-- [`cargo component`](https://github.com/bytecodealliance/cargo-component)
+- a rust toolchain with wasm32-wasip2 (`rustup target add wasm32-wasip2`)
 - [`wkg`](https://github.com/bytecodealliance/wasm-pkg-tools)
 
 ```sh
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..daaf687
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "1.89"
+targets = [ "wasm32-wasip2" ]