diff --git a/.travis.yml b/.travis.yml
index ea62f9dc4..12c22ce47 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,12 +15,12 @@ before_install:
   - conda install anaconda-client numpydoc
 install:
   # Install iverilog package.
-  - "sudo add-apt-repository -y ppa:mithro/iverilog-backport"
-  - "sudo apt-get update"
-  - "sudo apt-get install iverilog"
-  - "iverilog -v; true"
+  # - "sudo add-apt-repository -y ppa:mithro/iverilog-backport"
+  # - "sudo apt-get update"
+  # - "sudo apt-get install iverilog"
+  # - "iverilog -v; true"
   # Build the vpi module.
-  - "(cd vpi; make; sudo make install)"
+  # - "(cd vpi; make; sudo make install)"
   # Install verilator package
   - "sudo apt-get install verilator"
   - "verilator --version; true"