diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index 35f8fb43f7b56..1eda1608c4709 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -6,18 +6,22 @@ version = "0.0.0"
 [lib]
 name = "bootstrap"
 path = "lib.rs"
+doctest = false
 
 [[bin]]
 name = "bootstrap"
 path = "bin/main.rs"
+test = false
 
 [[bin]]
 name = "rustc"
 path = "bin/rustc.rs"
+test = false
 
 [[bin]]
 name = "rustdoc"
 path = "bin/rustdoc.rs"
+test = false
 
 [dependencies]
 build_helper = { path = "../build_helper" }
diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index 6db1afa54a625..f2fddf6e2ef3a 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -568,3 +568,14 @@ pub fn distcheck(build: &Build) {
                      .arg("check")
                      .current_dir(&dir));
 }
+
+/// Test the build system itself
+pub fn bootstrap(build: &Build) {
+    let mut cmd = Command::new(&build.cargo);
+    cmd.arg("test")
+       .current_dir(build.src.join("src/bootstrap"))
+       .env("CARGO_TARGET_DIR", build.out.join("bootstrap"))
+       .env("RUSTC", &build.rustc);
+    cmd.arg("--").args(&build.flags.cmd.test_args());
+    build.run(&mut cmd);
+}
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 9b0c7a04d6be2..ad851e448ea7c 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -354,14 +354,9 @@ pub fn analysis(build: &Build, compiler: &Compiler, target: &str) {
 }
 
 /// Creates the `rust-src` installer component and the plain source tarball
-pub fn rust_src(build: &Build, host: &str) {
+pub fn rust_src(build: &Build) {
     println!("Dist src");
 
-    if host != build.config.build {
-        println!("\tskipping, not a build host");
-        return
-    }
-
     let plain_name = format!("rustc-{}-src", package_vers(build));
     let name = format!("rust-src-{}", package_vers(build));
     let image = tmpdir(build).join(format!("{}-image", name));
diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index bbbf5cba8a1ab..42eae6d24f13a 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -57,12 +57,12 @@ pub fn rustbook(build: &Build, target: &str, name: &str) {
 /// `STAMP` alongw ith providing the various header/footer HTML we've cutomized.
 ///
 /// In the end, this is just a glorified wrapper around rustdoc!
-pub fn standalone(build: &Build, stage: u32, target: &str) {
-    println!("Documenting stage{} standalone ({})", stage, target);
+pub fn standalone(build: &Build, target: &str) {
+    println!("Documenting standalone ({})", target);
     let out = build.doc_out(target);
     t!(fs::create_dir_all(&out));
 
-    let compiler = Compiler::new(stage, &build.config.build);
+    let compiler = Compiler::new(0, &build.config.build);
 
     let favicon = build.src.join("src/doc/favicon.inc");
     let footer = build.src.join("src/doc/footer.inc");
diff --git a/src/bootstrap/step.rs b/src/bootstrap/step.rs
index 6a81f759dc73f..bf815a817ed87 100644
--- a/src/bootstrap/step.rs
+++ b/src/bootstrap/step.rs
@@ -365,6 +365,8 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
 
         suite("check-rpass-full", "src/test/run-pass-fulldeps",
               "run-pass", "run-pass-fulldeps");
+        suite("check-rfail-full", "src/test/run-fail-fulldeps",
+              "run-fail", "run-fail-fulldeps");
         suite("check-cfail-full", "src/test/compile-fail-fulldeps",
               "compile-fail", "compile-fail-fulldeps");
         suite("check-rmake", "src/test/run-make", "run-make", "run-make");
@@ -459,6 +461,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
          .dep(|s| s.name("tool-tidy").stage(0))
          .default(true)
          .host(true)
+         .only_build(true)
          .run(move |s| check::tidy(build, s.target));
     rules.test("check-error-index", "src/tools/error_index_generator")
          .dep(|s| s.name("libstd"))
@@ -482,6 +485,12 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
          .dep(|s| s.name("libtest"))
          .run(move |s| check::android_copy_libs(build, &s.compiler(), s.target));
 
+    rules.test("check-bootstrap", "src/bootstrap")
+         .default(true)
+         .host(true)
+         .only_build(true)
+         .run(move |_| check::bootstrap(build));
+
     // ========================================================================
     // Build tools
     //
@@ -516,9 +525,14 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
          .default(build.config.docs)
          .run(move |s| doc::rustbook(build, s.target, "nomicon"));
     rules.doc("doc-standalone", "src/doc")
-         .dep(move |s| s.name("rustc").host(&build.config.build).target(&build.config.build))
+         .dep(move |s| {
+             s.name("rustc")
+              .host(&build.config.build)
+              .target(&build.config.build)
+              .stage(0)
+         })
          .default(build.config.docs)
-         .run(move |s| doc::standalone(build, s.stage, s.target));
+         .run(move |s| doc::standalone(build, s.target));
     rules.doc("doc-error-index", "src/tools/error_index_generator")
          .dep(move |s| s.name("tool-error-index").target(&build.config.build).stage(0))
          .dep(move |s| s.name("librustc-link").stage(0))
@@ -550,6 +564,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
     rules.dist("dist-rustc", "src/librustc")
          .dep(move |s| s.name("rustc").host(&build.config.build))
          .host(true)
+         .only_host_build(true)
          .default(true)
          .run(move |s| dist::rustc(build, s.stage, s.target));
     rules.dist("dist-std", "src/libstd")
@@ -564,9 +579,11 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
              }
          })
          .default(true)
+         .only_host_build(true)
          .run(move |s| dist::std(build, &s.compiler(), s.target));
     rules.dist("dist-mingw", "path/to/nowhere")
          .default(true)
+         .only_host_build(true)
          .run(move |s| {
              if s.target.contains("pc-windows-gnu") {
                  dist::mingw(build, s.target)
@@ -575,14 +592,18 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
     rules.dist("dist-src", "src")
          .default(true)
          .host(true)
-         .run(move |s| dist::rust_src(build, s.target));
+         .only_build(true)
+         .only_host_build(true)
+         .run(move |_| dist::rust_src(build));
     rules.dist("dist-docs", "src/doc")
          .default(true)
+         .only_host_build(true)
          .dep(|s| s.name("default:doc"))
          .run(move |s| dist::docs(build, s.stage, s.target));
     rules.dist("dist-analysis", "analysis")
          .dep(|s| s.name("dist-std"))
          .default(true)
+         .only_host_build(true)
          .run(move |s| dist::analysis(build, &s.compiler(), s.target));
     rules.dist("install", "src")
          .dep(|s| s.name("default:dist"))
@@ -671,6 +692,14 @@ struct Rule<'a> {
     /// only intended for compiler hosts and not for targets that are being
     /// generated.
     host: bool,
+
+    /// Whether this rule is only for steps where the host is the build triple,
+    /// not anything in hosts or targets.
+    only_host_build: bool,
+
+    /// Whether this rule is only for the build triple, not anything in hosts or
+    /// targets.
+    only_build: bool,
 }
 
 #[derive(PartialEq)]
@@ -692,6 +721,8 @@ impl<'a> Rule<'a> {
             kind: kind,
             default: false,
             host: false,
+            only_host_build: false,
+            only_build: false,
         }
     }
 }
@@ -727,6 +758,16 @@ impl<'a, 'b> RuleBuilder<'a, 'b> {
         self.rule.host = host;
         self
     }
+
+    fn only_build(&mut self, only_build: bool) -> &mut Self {
+        self.rule.only_build = only_build;
+        self
+    }
+
+    fn only_host_build(&mut self, only_host_build: bool) -> &mut Self {
+        self.rule.only_host_build = only_host_build;
+        self
+    }
 }
 
 impl<'a, 'b> Drop for RuleBuilder<'a, 'b> {
@@ -896,19 +937,12 @@ invalid rule dependency graph detected, was a rule added and maybe typo'd?
                 path.ends_with(rule.path)
             })
         }).flat_map(|rule| {
-            let hosts = if self.build.flags.host.len() > 0 {
+            let hosts = if rule.only_host_build || rule.only_build {
+                &self.build.config.host[..1]
+            } else if self.build.flags.host.len() > 0 {
                 &self.build.flags.host
             } else {
-                if kind == Kind::Dist {
-                    // For 'dist' steps we only distribute artifacts built from
-                    // the build platform, so only consider that in the hosts
-                    // array.
-                    // NOTE: This relies on the fact that the build triple is
-                    // always placed first, as done in `config.rs`.
-                    &self.build.config.host[..1]
-                } else {
-                    &self.build.config.host
-                }
+                &self.build.config.host
             };
             let targets = if self.build.flags.target.len() > 0 {
                 &self.build.flags.target
@@ -928,6 +962,8 @@ invalid rule dependency graph detected, was a rule added and maybe typo'd?
                     &self.build.flags.host[..]
                 } else if self.build.flags.target.len() > 0 {
                     &[]
+                } else if rule.only_build {
+                    &self.build.config.host[..1]
                 } else {
                     &self.build.config.host[..]
                 }
@@ -955,12 +991,7 @@ invalid rule dependency graph detected, was a rule added and maybe typo'd?
 
         // Using `steps` as the top-level targets, make a topological ordering
         // of what we need to do.
-        let mut order = Vec::new();
-        let mut added = HashSet::new();
-        added.insert(Step::noop());
-        for step in steps.iter().cloned() {
-            self.fill(step, &mut order, &mut added);
-        }
+        let order = self.expand(steps);
 
         // Print out what we're doing for debugging
         self.build.verbose("bootstrap build plan:");
@@ -979,6 +1010,18 @@ invalid rule dependency graph detected, was a rule added and maybe typo'd?
         }
     }
 
+    /// From the top level targets `steps` generate a topological ordering of
+    /// all steps needed to run those steps.
+    fn expand(&self, steps: &[Step<'a>]) -> Vec<Step<'a>> {
+        let mut order = Vec::new();
+        let mut added = HashSet::new();
+        added.insert(Step::noop());
+        for step in steps.iter().cloned() {
+            self.fill(step, &mut order, &mut added);
+        }
+        return order
+    }
+
     /// Performs topological sort of dependencies rooted at the `step`
     /// specified, pushing all results onto the `order` vector provided.
     ///
@@ -1015,3 +1058,367 @@ invalid rule dependency graph detected, was a rule added and maybe typo'd?
         order.push(step);
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::env;
+
+    use Build;
+    use config::Config;
+    use flags::Flags;
+
+    macro_rules! a {
+        ($($a:expr),*) => (vec![$($a.to_string()),*])
+    }
+
+    fn build(args: &[&str],
+             extra_host: &[&str],
+             extra_target: &[&str]) -> Build {
+        let mut args = args.iter().map(|s| s.to_string()).collect::<Vec<_>>();
+        args.push("--build".to_string());
+        args.push("A".to_string());
+        let flags = Flags::parse(&args);
+
+        let mut config = Config::default();
+        config.docs = true;
+        config.build = "A".to_string();
+        config.host = vec![config.build.clone()];
+        config.host.extend(extra_host.iter().map(|s| s.to_string()));
+        config.target = config.host.clone();
+        config.target.extend(extra_target.iter().map(|s| s.to_string()));
+
+        let mut build = Build::new(flags, config);
+        let cwd = env::current_dir().unwrap();
+        build.crates.insert("std_shim".to_string(), ::Crate {
+            name: "std_shim".to_string(),
+            deps: Vec::new(),
+            path: cwd.join("src/std_shim"),
+            doc_step: "doc-std_shim".to_string(),
+            build_step: "build-crate-std_shim".to_string(),
+            test_step: "test-std_shim".to_string(),
+            bench_step: "bench-std_shim".to_string(),
+        });
+        build.crates.insert("test_shim".to_string(), ::Crate {
+            name: "test_shim".to_string(),
+            deps: Vec::new(),
+            path: cwd.join("src/test_shim"),
+            doc_step: "doc-test_shim".to_string(),
+            build_step: "build-crate-test_shim".to_string(),
+            test_step: "test-test_shim".to_string(),
+            bench_step: "bench-test_shim".to_string(),
+        });
+        build.crates.insert("rustc-main".to_string(), ::Crate {
+            name: "rustc-main".to_string(),
+            deps: Vec::new(),
+            path: cwd.join("src/rustc-main"),
+            doc_step: "doc-rustc-main".to_string(),
+            build_step: "build-crate-rustc-main".to_string(),
+            test_step: "test-rustc-main".to_string(),
+            bench_step: "bench-rustc-main".to_string(),
+        });
+        return build
+    }
+
+    #[test]
+    fn dist_baseline() {
+        let build = build(&["dist"], &[], &[]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+        assert!(plan.iter().all(|s| s.host == "A" ));
+        assert!(plan.iter().all(|s| s.target == "A" ));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(plan.contains(&step.name("dist-docs")));
+        assert!(plan.contains(&step.name("dist-mingw")));
+        assert!(plan.contains(&step.name("dist-rustc")));
+        assert!(plan.contains(&step.name("dist-std")));
+        assert!(plan.contains(&step.name("dist-src")));
+    }
+
+    #[test]
+    fn dist_with_targets() {
+        let build = build(&["dist"], &[], &["B"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+        assert!(plan.iter().all(|s| s.host == "A" ));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(plan.contains(&step.name("dist-docs")));
+        assert!(plan.contains(&step.name("dist-mingw")));
+        assert!(plan.contains(&step.name("dist-rustc")));
+        assert!(plan.contains(&step.name("dist-std")));
+        assert!(plan.contains(&step.name("dist-src")));
+
+        assert!(plan.contains(&step.target("B").name("dist-docs")));
+        assert!(plan.contains(&step.target("B").name("dist-mingw")));
+        assert!(!plan.contains(&step.target("B").name("dist-rustc")));
+        assert!(plan.contains(&step.target("B").name("dist-std")));
+        assert!(!plan.contains(&step.target("B").name("dist-src")));
+    }
+
+    #[test]
+    fn dist_with_hosts() {
+        let build = build(&["dist"], &["B"], &[]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(!plan.iter().any(|s| s.host == "B"));
+
+        assert!(plan.contains(&step.name("dist-docs")));
+        assert!(plan.contains(&step.name("dist-mingw")));
+        assert!(plan.contains(&step.name("dist-rustc")));
+        assert!(plan.contains(&step.name("dist-std")));
+        assert!(plan.contains(&step.name("dist-src")));
+
+        assert!(plan.contains(&step.target("B").name("dist-docs")));
+        assert!(plan.contains(&step.target("B").name("dist-mingw")));
+        assert!(plan.contains(&step.target("B").name("dist-rustc")));
+        assert!(plan.contains(&step.target("B").name("dist-std")));
+        assert!(!plan.contains(&step.target("B").name("dist-src")));
+    }
+
+    #[test]
+    fn dist_with_targets_and_hosts() {
+        let build = build(&["dist"], &["B"], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(!plan.iter().any(|s| s.host == "B"));
+        assert!(!plan.iter().any(|s| s.host == "C"));
+
+        assert!(plan.contains(&step.name("dist-docs")));
+        assert!(plan.contains(&step.name("dist-mingw")));
+        assert!(plan.contains(&step.name("dist-rustc")));
+        assert!(plan.contains(&step.name("dist-std")));
+        assert!(plan.contains(&step.name("dist-src")));
+
+        assert!(plan.contains(&step.target("B").name("dist-docs")));
+        assert!(plan.contains(&step.target("B").name("dist-mingw")));
+        assert!(plan.contains(&step.target("B").name("dist-rustc")));
+        assert!(plan.contains(&step.target("B").name("dist-std")));
+        assert!(!plan.contains(&step.target("B").name("dist-src")));
+
+        assert!(plan.contains(&step.target("C").name("dist-docs")));
+        assert!(plan.contains(&step.target("C").name("dist-mingw")));
+        assert!(!plan.contains(&step.target("C").name("dist-rustc")));
+        assert!(plan.contains(&step.target("C").name("dist-std")));
+        assert!(!plan.contains(&step.target("C").name("dist-src")));
+    }
+
+    #[test]
+    fn dist_target_with_target_flag() {
+        let build = build(&["dist", "--target=C"], &["B"], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(!plan.iter().any(|s| s.target == "A"));
+        assert!(!plan.iter().any(|s| s.target == "B"));
+        assert!(!plan.iter().any(|s| s.host == "B"));
+        assert!(!plan.iter().any(|s| s.host == "C"));
+
+        assert!(plan.contains(&step.target("C").name("dist-docs")));
+        assert!(plan.contains(&step.target("C").name("dist-mingw")));
+        assert!(!plan.contains(&step.target("C").name("dist-rustc")));
+        assert!(plan.contains(&step.target("C").name("dist-std")));
+        assert!(!plan.contains(&step.target("C").name("dist-src")));
+    }
+
+    #[test]
+    fn dist_host_with_target_flag() {
+        let build = build(&["dist", "--host=B", "--target=B"], &["B"], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        assert!(!plan.iter().any(|s| s.target == "A"));
+        assert!(!plan.iter().any(|s| s.target == "C"));
+        assert!(!plan.iter().any(|s| s.host == "B"));
+        assert!(!plan.iter().any(|s| s.host == "C"));
+
+        assert!(plan.contains(&step.target("B").name("dist-docs")));
+        assert!(plan.contains(&step.target("B").name("dist-mingw")));
+        assert!(plan.contains(&step.target("B").name("dist-rustc")));
+        assert!(plan.contains(&step.target("B").name("dist-std")));
+        assert!(plan.contains(&step.target("B").name("dist-src")));
+
+        let all = rules.expand(&plan);
+        println!("all rules: {:#?}", all);
+        assert!(!all.contains(&step.name("rustc")));
+        assert!(!all.contains(&step.name("build-crate-std_shim").stage(1)));
+    }
+
+    #[test]
+    fn build_default() {
+        let build = build(&["build"], &["B"], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        let step = super::Step {
+            name: "",
+            stage: 2,
+            host: &build.config.build,
+            target: &build.config.build,
+        };
+
+        // rustc built for all for of (A, B) x (A, B)
+        assert!(plan.contains(&step.name("librustc")));
+        assert!(plan.contains(&step.target("B").name("librustc")));
+        assert!(plan.contains(&step.host("B").target("A").name("librustc")));
+        assert!(plan.contains(&step.host("B").target("B").name("librustc")));
+
+        // rustc never built for C
+        assert!(!plan.iter().any(|s| {
+            s.name.contains("rustc") && (s.host == "C" || s.target == "C")
+        }));
+
+        // test built for everything
+        assert!(plan.contains(&step.name("libtest")));
+        assert!(plan.contains(&step.target("B").name("libtest")));
+        assert!(plan.contains(&step.host("B").target("A").name("libtest")));
+        assert!(plan.contains(&step.host("B").target("B").name("libtest")));
+        assert!(plan.contains(&step.host("A").target("C").name("libtest")));
+        assert!(plan.contains(&step.host("B").target("C").name("libtest")));
+
+        let all = rules.expand(&plan);
+        println!("all rules: {:#?}", all);
+        assert!(all.contains(&step.name("rustc")));
+        assert!(all.contains(&step.name("libstd")));
+    }
+
+    #[test]
+    fn build_filtered() {
+        let build = build(&["build", "--target=C"], &["B"], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+
+        assert!(!plan.iter().any(|s| s.name.contains("rustc")));
+        assert!(plan.iter().all(|s| {
+            !s.name.contains("test_shim") || s.target == "C"
+        }));
+    }
+
+    #[test]
+    fn test_default() {
+        let build = build(&["test"], &[], &[]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+        assert!(plan.iter().all(|s| s.host == "A"));
+        assert!(plan.iter().all(|s| s.target == "A"));
+
+        assert!(plan.iter().any(|s| s.name.contains("-ui")));
+        assert!(plan.iter().any(|s| s.name.contains("cfail")));
+        assert!(plan.iter().any(|s| s.name.contains("cfail")));
+        assert!(plan.iter().any(|s| s.name.contains("cfail-full")));
+        assert!(plan.iter().any(|s| s.name.contains("codegen-units")));
+        assert!(plan.iter().any(|s| s.name.contains("debuginfo")));
+        assert!(plan.iter().any(|s| s.name.contains("docs")));
+        assert!(plan.iter().any(|s| s.name.contains("error-index")));
+        assert!(plan.iter().any(|s| s.name.contains("incremental")));
+        assert!(plan.iter().any(|s| s.name.contains("linkchecker")));
+        assert!(plan.iter().any(|s| s.name.contains("mir-opt")));
+        assert!(plan.iter().any(|s| s.name.contains("pfail")));
+        assert!(plan.iter().any(|s| s.name.contains("rfail")));
+        assert!(plan.iter().any(|s| s.name.contains("rfail-full")));
+        assert!(plan.iter().any(|s| s.name.contains("rmake")));
+        assert!(plan.iter().any(|s| s.name.contains("rpass")));
+        assert!(plan.iter().any(|s| s.name.contains("rpass-full")));
+        assert!(plan.iter().any(|s| s.name.contains("rustc-all")));
+        assert!(plan.iter().any(|s| s.name.contains("rustdoc")));
+        assert!(plan.iter().any(|s| s.name.contains("std-all")));
+        assert!(plan.iter().any(|s| s.name.contains("test-all")));
+        assert!(plan.iter().any(|s| s.name.contains("tidy")));
+        assert!(plan.iter().any(|s| s.name.contains("valgrind")));
+    }
+
+    #[test]
+    fn test_with_a_target() {
+        let build = build(&["test", "--target=C"], &[], &["C"]);
+        let rules = super::build_rules(&build);
+        let plan = rules.plan();
+        println!("rules: {:#?}", plan);
+        assert!(plan.iter().all(|s| s.stage == 2));
+        assert!(plan.iter().all(|s| s.host == "A"));
+        assert!(plan.iter().all(|s| s.target == "C"));
+
+        assert!(plan.iter().any(|s| s.name.contains("-ui")));
+        assert!(plan.iter().any(|s| s.name.contains("cfail")));
+        assert!(plan.iter().any(|s| s.name.contains("cfail")));
+        assert!(!plan.iter().any(|s| s.name.contains("cfail-full")));
+        assert!(plan.iter().any(|s| s.name.contains("codegen-units")));
+        assert!(plan.iter().any(|s| s.name.contains("debuginfo")));
+        assert!(!plan.iter().any(|s| s.name.contains("docs")));
+        assert!(!plan.iter().any(|s| s.name.contains("error-index")));
+        assert!(plan.iter().any(|s| s.name.contains("incremental")));
+        assert!(!plan.iter().any(|s| s.name.contains("linkchecker")));
+        assert!(plan.iter().any(|s| s.name.contains("mir-opt")));
+        assert!(plan.iter().any(|s| s.name.contains("pfail")));
+        assert!(plan.iter().any(|s| s.name.contains("rfail")));
+        assert!(!plan.iter().any(|s| s.name.contains("rfail-full")));
+        assert!(!plan.iter().any(|s| s.name.contains("rmake")));
+        assert!(plan.iter().any(|s| s.name.contains("rpass")));
+        assert!(!plan.iter().any(|s| s.name.contains("rpass-full")));
+        assert!(!plan.iter().any(|s| s.name.contains("rustc-all")));
+        assert!(!plan.iter().any(|s| s.name.contains("rustdoc")));
+        assert!(plan.iter().any(|s| s.name.contains("std-all")));
+        assert!(plan.iter().any(|s| s.name.contains("test-all")));
+        assert!(!plan.iter().any(|s| s.name.contains("tidy")));
+        assert!(plan.iter().any(|s| s.name.contains("valgrind")));
+    }
+}
diff --git a/src/ci/docker/dist-arm-unknown-linux-gnueabi/Dockerfile b/src/ci/docker/dist-arm-unknown-linux-gnueabi/Dockerfile
new file mode 100644
index 0000000000000..9b0f1b7a0a763
--- /dev/null
+++ b/src/ci/docker/dist-arm-unknown-linux-gnueabi/Dockerfile
@@ -0,0 +1,30 @@
+FROM ubuntu:16.04
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  g++ \
+  make \
+  file \
+  curl \
+  ca-certificates \
+  python2.7 \
+  git \
+  cmake \
+  sudo \
+  gdb \
+  xz-utils \
+  g++-arm-linux-gnueabi
+
+ENV SCCACHE_DIGEST=7237e38e029342fa27b7ac25412cb9d52554008b12389727320bd533fd7f05b6a96d55485f305caf95e5c8f5f97c3313e10012ccad3e752aba2518f3522ba783
+RUN curl -L https://api.pub.build.mozilla.org/tooltool/sha512/$SCCACHE_DIGEST | \
+      tar xJf - -C /usr/local/bin --strip-components=1
+
+RUN curl -OL https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb && \
+    dpkg -i dumb-init_*.deb && \
+    rm dumb-init_*.deb
+ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+
+ENV RUST_CONFIGURE_ARGS --host=arm-unknown-linux-gnueabi
+ENV XPY_RUN \
+      dist \
+      --host arm-unknown-linux-gnueabi \
+      --target arm-unknown-linux-gnueabi
diff --git a/src/ci/docker/x86_64-freebsd/Dockerfile b/src/ci/docker/dist-x86_64-unknown-freebsd/Dockerfile
similarity index 74%
rename from src/ci/docker/x86_64-freebsd/Dockerfile
rename to src/ci/docker/dist-x86_64-unknown-freebsd/Dockerfile
index 86efa74ba3b6f..f1a6ccf9ebcf4 100644
--- a/src/ci/docker/x86_64-freebsd/Dockerfile
+++ b/src/ci/docker/dist-x86_64-unknown-freebsd/Dockerfile
@@ -28,7 +28,11 @@ RUN curl -L https://api.pub.build.mozilla.org/tooltool/sha512/$SCCACHE_DIGEST |
 
 ENV \
     AR_x86_64_unknown_freebsd=x86_64-unknown-freebsd10-ar \
-    CC_x86_64_unknown_freebsd=x86_64-unknown-freebsd10-gcc
+    CC_x86_64_unknown_freebsd=x86_64-unknown-freebsd10-gcc \
+    CXX_x86_64_unknown_freebsd=x86_64-unknown-freebsd10-g++
 
-ENV RUST_CONFIGURE_ARGS --target=x86_64-unknown-freebsd
-ENV RUST_CHECK_TARGET ""
+ENV RUST_CONFIGURE_ARGS --host=x86_64-unknown-freebsd
+ENV XPY_RUN \
+      dist \
+      --host x86_64-unknown-freebsd \
+      --target x86_64-unknown-freebsd
diff --git a/src/ci/docker/x86_64-freebsd/build-toolchain.sh b/src/ci/docker/dist-x86_64-unknown-freebsd/build-toolchain.sh
similarity index 98%
rename from src/ci/docker/x86_64-freebsd/build-toolchain.sh
rename to src/ci/docker/dist-x86_64-unknown-freebsd/build-toolchain.sh
index d4bc886d50ea4..0fd6beaf4c1c0 100644
--- a/src/ci/docker/x86_64-freebsd/build-toolchain.sh
+++ b/src/ci/docker/dist-x86_64-unknown-freebsd/build-toolchain.sh
@@ -77,7 +77,7 @@ cd gcc-$GCC
 mkdir ../gcc-build
 cd ../gcc-build
 ../gcc-$GCC/configure                            \
-  --enable-languages=c                           \
+  --enable-languages=c,c++                       \
   --target=$ARCH-unknown-freebsd10               \
   --disable-multilib                             \
   --disable-nls                                  \