diff --git a/.gitignore b/.gitignore
index 56e7c6c..3c8b309 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 target
-.rustup-installed
 .dir-locals.el
 *~
 *\#
diff --git a/Makefile b/Makefile
index 946f1fd..b2ed055 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: all clean test c t netsim-shell pat
 
-all: .rustup-installed release-build
+all: release-build
 
 debug-build:
 	cargo build
@@ -21,11 +21,6 @@ c: clean
 
 t: test
 
-.rustup-installed:
-	rustup install nightly
-	rustup install stable
-	touch $@
-
 .netsim:
 	mkdir $@
 	curl -Ss https://course.ccs.neu.edu/cs3700sp20/archive/tcp-sim.tgz | tar xzf - -C $@