diff --git a/syntex-0.42.2-incr-clean/.gitignore b/syntex-0.42.2-incr-clean/.gitignore
new file mode 100644
index 000000000..1af4d26b6
--- /dev/null
+++ b/syntex-0.42.2-incr-clean/.gitignore
@@ -0,0 +1,3 @@
+*~
+incr
+target
diff --git a/syntex-0.42.2-incr-clean/Cargo.lock b/syntex-0.42.2-incr-clean/Cargo.lock
new file mode 100644
index 000000000..65115157d
--- /dev/null
+++ b/syntex-0.42.2-incr-clean/Cargo.lock
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diff --git a/syntex-0.42.2-incr-clean/Cargo.toml b/syntex-0.42.2-incr-clean/Cargo.toml
new file mode 100644
index 000000000..ee6d05ef4
--- /dev/null
+++ b/syntex-0.42.2-incr-clean/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "incremental-syntex"
+version = "0.1.0"
+authors = ["Niko Matsakis <niko@alum.mit.edu>"]
+
+[dependencies]
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\ No newline at end of file
diff --git a/syntex-0.42.2-incr-clean/makefile b/syntex-0.42.2-incr-clean/makefile
new file mode 100644
index 000000000..912f25a02
--- /dev/null
+++ b/syntex-0.42.2-incr-clean/makefile
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+all:
+	RUSTFLAGS="-Z incremental=incr -Z incremental-info" $(CARGO_BUILD)
+
+touch:
+	cargo clean # note: leave the `incr` directory alone
+
+clean:
+	rm -rf incr/*
+	cargo clean
diff --git a/syntex-0.42.2-incr-clean/src/main.rs b/syntex-0.42.2-incr-clean/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/syntex-0.42.2-incr-clean/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/syntex-0.42.2/.gitignore b/syntex-0.42.2/.gitignore
new file mode 100644
index 000000000..394704b35
--- /dev/null
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\ No newline at end of file
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index 000000000..65115157d
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diff --git a/syntex-0.42.2/Cargo.toml b/syntex-0.42.2/Cargo.toml
new file mode 100644
index 000000000..ee6d05ef4
--- /dev/null
+++ b/syntex-0.42.2/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "incremental-syntex"
+version = "0.1.0"
+authors = ["Niko Matsakis <niko@alum.mit.edu>"]
+
+[dependencies]
+syntex = "0.42.2"
\ No newline at end of file
diff --git a/syntex-0.42.2/makefile b/syntex-0.42.2/makefile
new file mode 100644
index 000000000..1642edc15
--- /dev/null
+++ b/syntex-0.42.2/makefile
@@ -0,0 +1,8 @@
+all:
+	$(CARGO_BUILD)
+
+touch:
+	cargo clean
+
+clean:
+	cargo clean
diff --git a/syntex-0.42.2/src/main.rs b/syntex-0.42.2/src/main.rs
new file mode 100644
index 000000000..e7a11a969
--- /dev/null
+++ b/syntex-0.42.2/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}