diff --git a/.travis.yml b/.travis.yml
index a3f13c7ca..b53e91cc0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -94,7 +94,7 @@ install:
   - |
     if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
       CMAKE_URL="https://cmake.org/files/v3.13/cmake-3.13.0-rc3-Linux-x86_64.tar.gz"
-      mkdir cmake && travis_retry wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
+      mkdir -p cmake && travis_retry wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
       export PATH=${DEPS_DIR}/cmake/bin:${PATH}
       echo ${PATH}
     else
@@ -102,19 +102,19 @@ install:
     fi
   - cmake --version
 # Install latest iVerilog. Since no deb is provided, compile from source codes
-#  - |
-#    if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
-#      IVERILOG_URL="https://github.com/steveicarus/iverilog/archive/v10_3.tar.gz"
-#      travis_retry wget --no-check-certificate --quiet -O - ${IVERILOG_URL} | tar --strip-components=1 -xz -C iverilog-10.3
-#      cd iverlog-10.3
-#      sh autoconf.sh --prefix=${DEPS_DIR}/iverilog-10.3/bin
-#      ./configure --prefix=${DEPS_DIR}/iverilog-10.3/bin
-#      make -j4
-#      make check
-#      make install --prefix=${HOME}/iverilog-10.3/bin
-#      export PATH=${DEPS_DIR}/iverilog-10.3/bin:${PATH}
-#      echo ${PATH}
-#    fi
+  - |
+    if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
+      IVERILOG_URL="https://github.com/steveicarus/iverilog/archive/v10_3.tar.gz"
+      mkdir -p iverilog-10.3 && travis_retry wget --no-check-certificate --quiet -O - ${IVERILOG_URL} | tar --strip-components=1 -xz -C iverilog-10.3
+      cd iverlog-10.3
+      sh autoconf.sh --prefix=${DEPS_DIR}/iverilog-10.3/bin
+      ./configure --prefix=${DEPS_DIR}/iverilog-10.3/bin
+      make -j4
+      make check
+      make install --prefix=${HOME}/iverilog-10.3/bin
+      export PATH=${DEPS_DIR}/iverilog-10.3/bin:${PATH}
+      echo ${PATH}
+    fi
   - iverilog -V
   - cd -
   - .travis/install.sh