Failed to install Python Cryptography package with PIP and setup.py

Confirming OpenSSL: Present and accounted for

OpenSSL is like Spartan warriors — a crucial part of any Cryptography campaign. In the land of Windows, ensure you've the freshest batch of warriors, i.e., the latest version, and set the right environment variables:

set LIB=C:\OpenSSL-win64\lib;%LIB%  # Spartan training grounds
set INCLUDE=C:\OpenSSL-win64\include;%INCLUDE%  # Spartan strategy room


For macOS dwellers, associate with the Homebrew tribe for a simpler recruitment process:

brew install [email protected]  # Calls for a batch of OpenSSL warriors


Don't forget to link OpenSSL if your Homebrew allies seem somewhat forgetful:

brew link --force [email protected]  # "Go forth, my warriors!"


Pre-compiled binaries: Your hidden usurpers

Considering using pre-compiled binaries, the mercenaries that can be purchased to speed up your conquests and avoid compilation battles. Here is the chant to use for Windows and MacOS:

pip wheel cryptography  # "From the east, the spies shall come"


Compiler and Rust: The blacksmith and the bard on your journey

To forge sophisticated version 3.4 or higher weapons, you'll need to hire a Rust's cargo bard for epic buffs:

curl https://sh.rustup.rs -sSf | sh  # Plays an infectious Bard melody


Meanwhile, send your gcc blacksmith to an advanced academy to prevent him from creating duds:

sudo apt-get install gcc  # "To the academy with thee, Smith!"


And for Fedora/RHEL territories:

sudo yum install gcc  # "Thy Smith shall learn new tricks!"


Setting flags for compilation: Strategize for victory

Make your army maneuver more effectively by setting compilation flags, like your war banners: ARCHFLAGS, LDFLAGS, and CFLAGS to intimidate the enemy with your flexible position:

export LDFLAGS="-L/usr/local/opt/[email protected]/lib"  # "To the left, my men!"
export CFLAGS="-I/usr/local/opt/[email protected]/include"  # "Cavalry, stay behind!"


Additional Python packages: Additional troops in the line

Call upon the allies like pyopenssl, ndg-httpsclient, and pyasn1 for reinforcement. Here's the signal:

pip install pyopenssl ndg-httpsclient pyasn1  # "I call upon thee, my allies!"


Using virtual environments: Evade enemy's eyes

To avoid conflict with your domestic affairs (system), use the cover of virtual environments for all your movements:

python -m venv myenv
source myenv/bin/activate
pip install cryptography


Virtual environments are like cover of night, providing a neat and encapsulated space for your attacks, reducing chances of being spotted by system-wide packages.

Common pitfalls and remedies: Stand strong against adversity

After OpenSSL install on Windows: Looking for a needle in a haystack?

• Verify the environmental map is set rightly
• Ensure PATH includes the bin tavern where all OpenSSL warriors gather

For Linux territories: Additional troops you may require

For Debian factions:

sudo apt-get install libssl-dev libffi-dev python-dev  # "More troops to the frontline!"


For Fedora and RHEL clans:

sudo yum install openssl-devel libffi-devel python3-devel  # "Charge, my knights!"


When using cryptography 3.4+ with Rust compiler: Did the Rust bard play the wrong note?

• Use rustup to keep your bard's tunes fresh
• Ensure your bards are playing the tune of the correct version

Before embarking the cryptography journey: Do you have the map?

Double-check your journey's map to ensure your mainland is there. Not all territories support this adventure, so don't ignore this crucial step.

More helping hands: Support, both paid and unpaid

Should you find yourself in a Boss Fight you're not prepared for, calling for extra support might not be a bad idea.

• Seek a professional healer or a sage, for their knowledge is expansive and filled with wisdom. Or, if you're a frugal adventurer, engage with fellow warriors in community support:

  • Join a Guild (Cryptography documentation and FAQ).
  • Participate in friendly Duels and Debates (Community forums and discussion boards).
  • Expose your Battle Log (Detailed error logs) for community-driven strategy.

More deep dives: Wading through the swamp for precious artifacts

Custom build environments: A unique battle strategy

Crafting unique battle maneuvers (custom build scripts), or operating under restricted warfare rules (within restricted environments) calls for:

• Create custom War Cry (pip install command) based on your battlefield.
• Employ Shape-shifters or Familiar Spirits (Docker containers or CI/CD systems) that can replicate any environment you need.

Error log analysis: Deciphering the enemy's plans

Finding the chinks in your enemy's armor through their battle plans (error logs) can make your journey smoother:

• Look for messages about missing weapons or army units (compilers or headers).
• Identify errors that hint at strange landscapes or unknown enemies (unsupported systems or architecture problems).
• Pinpoint any conflicts in war strategy (version conflicts). Some battles (versions of Cryptography) might need slightly different strategies (versions of dependencies like OpenSSL).