diff --git a/Makefile b/Makefile
index c149bf8..90455e7 100644
--- a/Makefile
+++ b/Makefile
@@ -18,9 +18,9 @@ ubuntu_setenv:
 	cd ${HOME} && sudo wget https://static.dev.sifive.com/dev-tools/freedom-tools/v2020.08/riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14.tar.gz
 	cd ${HOME} && sudo tar xzf riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14.tar.gz
 	cd ${HOME} && sudo mv riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14 riscv64-unknown-elf-gcc
-	#cd ${HOME} && sudo git clone https://github.com/os-lecture/toolchain-riscv64-linux-musl-cross.git riscv64-linux-musl-cross
-	cd ${HOME} && sudo wget -O riscv64-linux-musl-cross.tgz https://cloud.tsinghua.edu.cn/f/11646b3c420d4055ba20/?dl=1
-	cd ${HOME} && sudo tar xzf riscv64-linux-musl-cross.tgz
+	cd ${HOME} && sudo git clone https://github.com/os-lecture/toolchain-riscv64-linux-musl-cross.git riscv64-linux-musl-cross
+	#cd ${HOME} && sudo wget -O riscv64-linux-musl-cross.tgz https://cloud.tsinghua.edu.cn/f/11646b3c420d4055ba20/?dl=1
+	#cd ${HOME} && sudo tar xzf riscv64-linux-musl-cross.tgz
 	#sudo echo export PATH=\"\$$HOME/riscv64-unknown-elf-gcc/bin:\$$PATH\" >>  ~/.bashrc
 	#sudo echo export PATH=\"\$$HOME/riscv64-linux-musl-cross/bin:\$$PATH\" >> ~/.bashrc
 	#source ~/.bashrc  
@@ -50,9 +50,9 @@ codespaces_setenv:
 	cd ${HOME} && sudo wget https://static.dev.sifive.com/dev-tools/freedom-tools/v2020.08/riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14.tar.gz
 	cd ${HOME} && sudo tar xzf riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14.tar.gz
 	cd ${HOME} && sudo mv riscv64-unknown-elf-gcc-10.1.0-2020.08.2-x86_64-linux-ubuntu14 riscv64-unknown-elf-gcc
-	#cd ${HOME} && sudo git clone https://github.com/os-lecture/toolchain-riscv64-linux-musl-cross.git riscv64-linux-musl-cross
-	cd ${HOME} && sudo wget -O riscv64-linux-musl-cross.tgz https://cloud.tsinghua.edu.cn/f/11646b3c420d4055ba20/?dl=1
-	cd ${HOME} && sudo tar xzf riscv64-linux-musl-cross.tgz
+	cd ${HOME} && sudo git clone https://github.com/os-lecture/toolchain-riscv64-linux-musl-cross.git riscv64-linux-musl-cross
+	#cd ${HOME} && sudo wget -O riscv64-linux-musl-cross.tgz https://cloud.tsinghua.edu.cn/f/11646b3c420d4055ba20/?dl=1
+	#cd ${HOME} && sudo tar xzf riscv64-linux-musl-cross.tgz
 	#sudo echo export PATH=\"\$$HOME/riscv64-unknown-elf-gcc/bin:\$$PATH\" >>  ~/.bashrc
 	#sudo echo export PATH=\"\$$HOME/riscv64-linux-musl-cross/bin:\$$PATH\" >> ~/.bashrc
 	#source ~/.bashrc