diff --git a/.github/workflows/extension_tests.yml b/.github/workflows/extension_tests.yml
index 5584a5f35add88e4e223a34fbd2198e6996d388f..90c7552ee1cc16f2e2193cf7de2696202afacffd 100644
--- a/.github/workflows/extension_tests.yml
+++ b/.github/workflows/extension_tests.yml
@@ -6,6 +6,7 @@ env:
   RUST_BACKTRACE: '1'
   CARGO_INCREMENTAL: '0'
   ZED_EXTENSION_CLI_SHA: 7cfce605704d41ca247e3f84804bf323f6c6caaf
+  CARGO_BUILD_TARGET: wasm32-wasip2
 on:
   workflow_call: {}
 jobs:
diff --git a/Cargo.lock b/Cargo.lock
index 5ec4a4414ab08aaea33cf22f19aa63e62fb8a0ed..0329e18e32a943736231256a1abb4f92b42e1735 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20688,6 +20688,7 @@ dependencies = [
  "cargo_metadata",
  "cargo_toml",
  "clap",
+ "extension",
  "gh-workflow",
  "indexmap",
  "indoc",
diff --git a/crates/extension/src/extension_builder.rs b/crates/extension/src/extension_builder.rs
index 6d7c3206e8811c88781348946b07fd0f81dd5c3b..252c8f00b4481747266d5a08ec21be91f00ce40b 100644
--- a/crates/extension/src/extension_builder.rs
+++ b/crates/extension/src/extension_builder.rs
@@ -19,7 +19,7 @@ use wasm_encoder::{ComponentSectionId, Encode as _, RawSection, Section as _};
 use wasmparser::Parser;
 
 /// Currently, we compile with Rust's `wasm32-wasip2` target, which works with WASI `preview2` and the component model.
-const RUST_TARGET: &str = "wasm32-wasip2";
+pub const RUST_TARGET: &str = "wasm32-wasip2";
 
 /// Compiling Tree-sitter parsers from C to WASM requires Clang 17, and a WASM build of libc
 /// and clang's runtime library. The `wasi-sdk` provides these binaries.
diff --git a/tooling/xtask/Cargo.toml b/tooling/xtask/Cargo.toml
index 13179b2eb69ba9a63ba6be5784907b78bba1b9f2..8f775b44038fc2dcc14ee451066a49742c873da8 100644
--- a/tooling/xtask/Cargo.toml
+++ b/tooling/xtask/Cargo.toml
@@ -14,6 +14,7 @@ backtrace.workspace = true
 cargo_metadata.workspace = true
 cargo_toml.workspace = true
 clap = { workspace = true, features = ["derive"] }
+extension.workspace = true
 toml.workspace = true
 indoc.workspace = true
 indexmap.workspace = true
diff --git a/tooling/xtask/src/tasks/workflows/extension_tests.rs b/tooling/xtask/src/tasks/workflows/extension_tests.rs
index 9183c61da105e3fda4ae37d8238f2327a2c8dde2..9d7e233d562fd634960454a6490d8a861459763d 100644
--- a/tooling/xtask/src/tasks/workflows/extension_tests.rs
+++ b/tooling/xtask/src/tasks/workflows/extension_tests.rs
@@ -32,6 +32,10 @@ pub(crate) fn extension_tests() -> Workflow {
         .add_env(("RUST_BACKTRACE", 1))
         .add_env(("CARGO_INCREMENTAL", 0))
         .add_env(("ZED_EXTENSION_CLI_SHA", ZED_EXTENSION_CLI_SHA))
+        .add_env((
+            "CARGO_BUILD_TARGET",
+            extension::extension_builder::RUST_TARGET,
+        ))
         .map(|workflow| {
             jobs.into_iter()
                 .chain([tests_pass])