Unable to install via pods

[MagicFlow29]

Followed instructions, and pod install fails with:

./configure: line 12069: PKG_PROG_PKG_CONFIG: command not found

• make install
  libtool: warning: remember to run 'libtool --finish /var/folders/t7/sx80rz396g98rcy3q3s4z6cw0000gn/T/tmp.sfVXCU6Q/.build/iphoneos/lib'
• cd -
• mkdir -p ./../Libraries/secp256k1/lib
• xcrun lipo -create /var/folders/t7/sx80rz396g98rcy3q3s4z6cw0000gn/T/tmp.sfVXCU6Q/.build/iphoneos/lib/libsecp256k1.a /var/folders/t7/sx80rz396g98rcy3q3s4z6cw0000gn/T/tmp.sfVXCU6Q/.build/iphonesimulator/lib/libsecp256k1.a -o ./../Libraries/secp256k1/lib/libsecp256k1.a
  fatal error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo: /var/folders/t7/sx80rz396g98rcy3q3s4z6cw0000gn/T/tmp.sfVXCU6Q/.build/iphoneos/lib/libsecp256k1.a and /var/folders/t7/sx80rz396g98rcy3q3s4z6cw0000gn/T/tmp.sfVXCU6Q/.build/iphonesimulator/lib/libsecp256k1.a have the same architectures (i386) and can't be in the same fat output file