diff --git a/Makefile b/Makefile
index 3d0ca59..9146246 100644
--- a/Makefile
+++ b/Makefile
@@ -165,6 +165,7 @@ setupclassroom_test8:
 
 # for local ubuntu with zsh shell SHELL, need root for sudo
 ubuntu_local_setenv:
+	sudo apt-get update
 	sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
               gawk build-essential bison flex texinfo gperf libtool patchutils bc \
               zlib1g-dev libexpat-dev pkg-config  libglib2.0-dev libpixman-1-dev git tmux python3 ninja-build zsh -y
@@ -181,6 +182,7 @@ ubuntu_local_setenv:
 
 # for github codespaces ubuntu with zsh SHELL, need root for sudo
 codespaces_setenv:
+	sudo apt-get update
 	sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
               gawk build-essential bison flex texinfo gperf libtool patchutils bc \
               zlib1g-dev libexpat-dev pkg-config  libglib2.0-dev libpixman-1-dev git tmux python3 ninja-build zsh -y