diff --git a/bin/wally-tool-chain-install.sh b/bin/wally-tool-chain-install.sh
old mode 100644
new mode 100755
index b66e01da..fa368593
--- a/bin/wally-tool-chain-install.sh
+++ b/bin/wally-tool-chain-install.sh
@@ -7,23 +7,23 @@ NUM_THREADS=4
 apt update
 
 # INSTALL 
-apt install -y git gawk make texinfo bison flex build-essential python libz-dev libexpat-dev autoconf device-tree-compiler ninja-build libpixman-1-dev build-essential ncurses-base ncurses-bin libncurses5-dev dialog curl wget ftp libgmp-dev 
+apt install -y git gawk make texinfo bison flex build-essential python3 libz-dev libexpat-dev autoconf device-tree-compiler ninja-build libpixman-1-dev build-essential ncurses-base ncurses-bin libncurses5-dev dialog curl wget ftp libgmp-dev 
 
 # gcc cross-compiler
-git clone https://github.com/riscv/riscv-gnu-toolchain && \
-    cd riscv-gnu-toolchain && \
-    ./configure --prefix=${RISCV} --enable-multilib --with-multilib-generator="rv32e-ilp32e--;rv32i-ilp32--;rv32im-ilp32--;rv32iac-ilp32--;rv32imac-ilp32--;rv32imafc-ilp32f--;rv32imafdc-ilp32d--;rv64i-lp64--;rv64ic-lp64--;rv64iac-lp64--;rv64imac-lp64--;rv64imafdc-lp64d--;rv64im-lp64--;" && \
-    make -j $(NUM_THREADS) && \
-    make install
+git clone https://github.com/riscv/riscv-gnu-toolchain
+cd riscv-gnu-toolchain
+./configure --prefix=${RISCV} --enable-multilib --with-multilib-generator="rv32e-ilp32e--;rv32i-ilp32--;rv32im-ilp32--;rv32iac-ilp32--;rv32imac-ilp32--;rv32imafc-ilp32f--;rv32imafdc-ilp32d--;rv64i-lp64--;rv64ic-lp64--;rv64iac-lp64--;rv64imac-lp64--;rv64imafdc-lp64d--;rv64im-lp64--;"
+make -j $(NUM_THREADS)
+make install
 
 # elf2hex
 export PATH=$RISCV/riscv-gnu-toolchain/bin:$PATH
-git clone https://github.com/sifive/elf2hex.git && \
-  cd elf2hex && \
-  autoreconf -i && \
-  ./configure --target=riscv64-unknown-elf --prefix=$RISCV && \
-  make && \
-  make install
+git clone https://github.com/sifive/elf2hex.git
+cd elf2hex
+autoreconf -i
+./configure --target=riscv64-unknown-elf --prefix=$RISCV
+make
+make install
 
 # Update Python3.6 for QEMU
 apt-get -y update
@@ -32,50 +32,50 @@ apt-get -y install pkg-config
 apt-get -y install libglib2.0-dev
 
 # QEMU
-git clone --recurse-submodules https://github.com/qemu/qemu && \
-  cd qemu && \
-  ./configure --target-list=riscv64-softmmu --prefix=$RISCV  && \
-  make -j $(NUM_THREADS) && \
-  make install
+git clone --recurse-submodules https://github.com/qemu/qemu
+cd qemu
+./configure --target-list=riscv64-softmmu --prefix=$RISCV 
+make -j $(NUM_THREADS)
+make install
 
 # Spike
-git clone https://github.com/riscv-software-src/riscv-isa-sim && \
-  mkdir riscv-isa-sim/build && \
-  cd riscv-isa-sim/build && \
-  ../configure --prefix=$RISCV --enable-commitlog && \
-  make -j $(NUM_THREADS) && \
-  make install  && \
-  cd ../arch_test_target/spike/device && \
-  sed -i 's/--isa=rv32ic/--isa=rv32iac/' rv32i_m/privilege/Makefile.include && \
-  sed -i 's/--isa=rv64ic/--isa=rv64iac/' rv64i_m/privilege/Makefile.include
+git clone https://github.com/riscv-software-src/riscv-isa-sim
+mkdir riscv-isa-sim/build
+cd riscv-isa-sim/build
+../configure --prefix=$RISCV --enable-commitlog
+make -j $(NUM_THREADS)
+make install 
+cd ../arch_test_target/spike/device
+sed -i 's/--isa=rv32ic/--isa=rv32iac/' rv32i_m/privilege/Makefile.include
+sed -i 's/--isa=rv64ic/--isa=rv64iac/' rv64i_m/privilege/Makefile.include
 
 # SAIL
-apt-get install -y opam  build-essential libgmp-dev z3 pkg-config zlib1g-dev && \
-  git clone https://github.com/Z3Prover/z3.git && \
-  cd z3 && \
-  python scripts/mk_make.py && \
-  cd build && \
-  make  -j $(NUM_THREADS)  && \
-  make install && \
-  cd ../.. && \
-  pip3 install chardet==3.0.4 && \
-  pip3 install urllib3==1.22 && \
-  opam init -y --disable-sandboxing && \
-  opam switch create ocaml-base-compiler.4.06.1 && \
-  opam install sail -y 
+apt-get install -y opam  build-essential libgmp-dev z3 pkg-config zlib1g-dev
+git clone https://github.com/Z3Prover/z3.git
+cd z3
+python scripts/mk_make.py
+cd build
+make  -j $(NUM_THREADS) 
+make install
+cd ../..
+pip3 install chardet==3.0.4
+pip3 install urllib3==1.22
+opam init -y --disable-sandboxing
+opam switch create ocaml-base-compiler.4.06.1
+opam install sail -y 
 
-eval $(opam config env) && \
-  git clone https://github.com/riscv/sail-riscv.git && \
-  cd sail-riscv && \
-  make -j $(NUM_THREADS) && \
-  ARCH=RV32 make -j $(NUM_THREADS) && \
-  ARCH=RV64 make -j $(NUM_THREADS)  && \
-  ln -s $RISCV/sail-riscv/c_emulator/riscv_sim_RV64 /usr/bin/riscv_sim_RV64 && \
-  ln -s $RISCV/sail-riscv/c_emulator/riscv_sim_RV32 /usr/bin/riscv_sim_RV32
+eval $(opam config env)
+git clone https://github.com/riscv/sail-riscv.git
+cd sail-riscv
+make -j $(NUM_THREADS)
+ARCH=RV32 make -j $(NUM_THREADS)
+ARCH=RV64 make -j $(NUM_THREADS) 
+ln -s $RISCV/sail-riscv/c_emulator/riscv_sim_RV64 /usr/bin/riscv_sim_RV64
+ln -s $RISCV/sail-riscv/c_emulator/riscv_sim_RV32 /usr/bin/riscv_sim_RV32
 
-pip3 install testresources && \
-  pip3 install riscof --ignore-installed PyYAML
+pip3 install testresources
+pip3 install riscof --ignore-installed PyYAML
 
 # Verilator
-apt install verilator
+apt install -y verilator