# How to install Zenmap on Parrot OS

## Installation error

I encountered `error: specify a sequence to run` while trying to install zenmap on Parrot OS (using alien version 8.95.3)
![01.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1614854392989/KSSYxylPY.png)

## Workaround

1. Downgrade and install [alien 8.90](https://snapshot.debian.org/package/alien/8.90/) instead.
`dpkg -i alien_8.90_all.deb`
![02.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1614854427929/uZPQFXC5C.png)
`alien zenmap-7.91-1.noarch.rpm`
![03.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1614854442253/-F852QJvb.png)

2. Install zenmap
`dpkg -i zenmap_7.91-2_all.deb`
![04.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1614854453365/qbaO5qP0T.png)

3. Open Zenmap
![05.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1614854462984/BoXUsPQKW.png)