agent: Add note to readme to run build_linux.sh with `pipenv run`

monkey/infection_monkey/readme.md

@@ -14,16 +14,16 @@ The monkey is composed of three separate parts.
 1. Install python 3.7.4 and choose **ADD to PATH** option when installing.
 
     Download and install from: <https://www.python.org/ftp/python/3.7.4/>
-    
+
     In case you still need to add python directories to path:
-    - Run the following command on a cmd console (Replace C:\Python37 with your python directory if it's different) 
+    - Run the following command on a cmd console (Replace C:\Python37 with your python directory if it's different)
     `setx /M PATH "%PATH%;C:\Python37;C:\Python37\Scripts`
     - Close the console, make sure you execute all commands in a new cmd console from now on.
 2. Install further dependencies
     - if not installed, install Microsoft Visual C++ 2017 SP1 Redistributable Package
         - 32bit: <https://aka.ms/vs/16/release/vc_redist.x86.exe>
         - 64bit: <https://go.microsoft.com/fwlink/?LinkId=746572>
-3. Download the dependent python packages using 
+3. Download the dependent python packages using
         `pip install -r requirements.txt`
 4. Download and extract UPX binary to monkey\infection_monkey\bin\upx.exe:
         <https://github.com/upx/upx/releases/download/v3.94/upx394w.zip>
@@ -63,8 +63,8 @@ Tested on Ubuntu 16.04.
 5. To build, run in terminal:
     - `cd [code location]/infection_monkey`
     - `chmod +x build_linux.sh`
-    - `./build_linux.sh`
-    
+    - `pipenv run ./build_linux.sh`
+
     output is placed under `dist/monkey32` or `dist/monkey64` depending on your version of python
 
 ### Sambacry