diff --git a/src/Cargo.lock b/src/Cargo.lock
index ec45f45ccb6..c058586410d 100644
--- a/src/Cargo.lock
+++ b/src/Cargo.lock
@@ -597,7 +597,7 @@ dependencies = [
 
 [[package]]
 name = "std_shim"
-version = "0.1.0"
+version = "0.0.0"
 dependencies = [
  "core 0.0.0",
  "std 0.0.0",
@@ -656,7 +656,7 @@ dependencies = [
 
 [[package]]
 name = "test_shim"
-version = "0.1.0"
+version = "0.0.0"
 dependencies = [
  "test 0.0.0",
 ]
diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index 4aca843558f..19aac0f36bb 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -383,7 +383,7 @@ pub fn krate(build: &Build,
                 // helper crate, not tested. If it leaks through then it ends up
                 // messing with various mtime calculations and such.
                 if !name.contains("jemalloc") && name != "build_helper" {
-                    cargo.arg("-p").arg(name);
+                    cargo.arg("-p").arg(&format!("{}:0.0.0", name));
                 }
                 for dep in build.crates[name].deps.iter() {
                     if visited.insert(dep) {
diff --git a/src/rustc/std_shim/Cargo.toml b/src/rustc/std_shim/Cargo.toml
index 7260a844073..14c9c5544b1 100644
--- a/src/rustc/std_shim/Cargo.toml
+++ b/src/rustc/std_shim/Cargo.toml
@@ -21,7 +21,7 @@
 
 [package]
 name = "std_shim"
-version = "0.1.0"
+version = "0.0.0"
 authors = ["The Rust Project Developers"]
 
 [lib]
diff --git a/src/rustc/test_shim/Cargo.toml b/src/rustc/test_shim/Cargo.toml
index ac7842770f5..6ef613eee06 100644
--- a/src/rustc/test_shim/Cargo.toml
+++ b/src/rustc/test_shim/Cargo.toml
@@ -5,7 +5,7 @@
 
 [package]
 name = "test_shim"
-version = "0.1.0"
+version = "0.0.0"
 authors = ["The Rust Project Developers"]
 
 [lib]