diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 00000000000..3f239d40fd0
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+# Folders we don't want to copy to Docker daemon in `docker build . -t cosmwasm/wasmd:latest`
+build/
diff --git a/Dockerfile b/Dockerfile
index 1180a966e55..4fc2dacda69 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,24 +1,11 @@
 # docker build . -t cosmwasm/wasmd:latest
 # docker run --rm -it cosmwasm/wasmd:latest /bin/sh
-FROM cosmwasm/go-ext-builder:0002-alpine AS rust-builder
+FROM golang:1.15-alpine3.12 AS go-builder
 
-RUN apk add git
-
-# copy all code into /code
-WORKDIR /code
-COPY go.* /code/
-
-# download all deps
-RUN go mod download github.com/CosmWasm/wasmvm
-
-# build wasmvm *.a and install it
-RUN export GO_WASM_DIR=$(go list -f "{{ .Dir }}" -m github.com/CosmWasm/wasmvm) && \
-    cd ${GO_WASM_DIR} && \
-    cargo build --release --features backtraces --example muslc && \
-    mv ${GO_WASM_DIR}/target/release/examples/libmuslc.a /lib/libwasmvm_muslc.a
-
-# --------------------------------------------------------
-FROM cosmwasm/go-ext-builder:0002-alpine AS go-builder
+# this comes from standard alpine nightly file
+#  https://github.com/rust-lang/docker-rust-nightly/blob/master/alpine3.12/Dockerfile
+# with some changes to support our toolchain, etc
+RUN set -eux; apk add --no-cache ca-certificates build-base;
 
 RUN apk add git
 # NOTE: add these to run with LEDGER_ENABLED=true
@@ -27,7 +14,9 @@ RUN apk add git
 WORKDIR /code
 COPY . /code/
 
-COPY --from=rust-builder /lib/libwasmvm_muslc.a /lib/libwasmvm_muslc.a
+# See https://github.com/CosmWasm/wasmvm/releases
+ADD https://github.com/CosmWasm/wasmvm/releases/download/v0.12.0/libwasmvm_muslc.a /lib/libwasmvm_muslc.a
+RUN sha256sum /lib/libwasmvm_muslc.a | grep 00ee24fefe094d919f5f83bf1b32948b1083245479dad8ccd5654c7204827765
 
 # force it to use static lib (from above) not standard libgo_cosmwasm.so file
 RUN LEDGER_ENABLED=false BUILD_TAGS=muslc make build
diff --git a/go.mod b/go.mod
index e36b4521266..3b03e8105da 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/CosmWasm/wasmd
 go 1.15
 
 require (
-	github.com/CosmWasm/wasmvm v0.12.0-alpha1
+	github.com/CosmWasm/wasmvm v0.12.0
 	github.com/cosmos/cosmos-sdk v0.40.0-rc3
 	github.com/cosmos/iavl v0.15.0-rc4
 	github.com/dvsekhvalnov/jose2go v0.0.0-20200901110807-248326c1351b
diff --git a/go.sum b/go.sum
index 83eb915fec3..f33dd43e83c 100644
--- a/go.sum
+++ b/go.sum
@@ -18,8 +18,8 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/ChainSafe/go-schnorrkel v0.0.0-20200405005733-88cbf1b4c40d h1:nalkkPQcITbvhmL4+C4cKA87NW0tfm3Kl9VXRoPywFg=
 github.com/ChainSafe/go-schnorrkel v0.0.0-20200405005733-88cbf1b4c40d/go.mod h1:URdX5+vg25ts3aCh8H5IFZybJYKWhJHYMTnf+ULtoC4=
-github.com/CosmWasm/wasmvm v0.12.0-alpha1 h1:UPaemjM+O/9uQRDCiExXPpcUlMJ5Zo8N/BUvqjheb5A=
-github.com/CosmWasm/wasmvm v0.12.0-alpha1/go.mod h1:tbXGE9Jz6sYpiJroGr71OQ5TFOufq/P5LWsruA2u6JE=
+github.com/CosmWasm/wasmvm v0.12.0 h1:L9ez6fCg2Co1SgCm0YHjbnewZ8myemu2cm/QL0qR1OE=
+github.com/CosmWasm/wasmvm v0.12.0/go.mod h1:tbXGE9Jz6sYpiJroGr71OQ5TFOufq/P5LWsruA2u6JE=
 github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/DataDog/zstd v1.4.5 h1:EndNeuB0l9syBZhut0wns3gV1hL8zX8LIu6ZiVHWLIQ=