unable to build in Xcode

hi I get this error message while trying to build my app

CodeSign /Users/varunbhandari/Library/Developer/Xcode/DerivedData/IIR-bmlukqunvjjciackjnaowbqrozwx/Build/Products/Debug-iphoneos/IIR.app (in target 'IIR' from project 'IIR') cd /Users/varunbhandari/Documents/IIR

Signing Identity:     "Apple Development: Varun Bhandari (ZY262U433E)"
Provisioning Profile: "iOS Team Provisioning Profile: *"
                      (b8adc19e-d3a8-4378-b45a-4bd5e1c4087e)

&#x2F;usr&#x2F;bin&#x2F;codesign --force --sign 564FF6C0B73269CB700ACFE64EE27B00FDB2CC62 --entitlements &#x2F;Users&#x2F;varunbhandari&#x2F;Library&#x2F;Developer&#x2F;Xcode&#x2F;DerivedData&#x2F;IIR-bmlukqunvjjciackjnaowbqrozwx&#x2F;Build&#x2F;Intermediates.noindex&#x2F;IIR.build&#x2F;Debug-iphoneos&#x2F;IIR.build&#x2F;IIR.app.xcent --timestamp\=none --generate-entitlement-der &#x2F;Users&#x2F;varunbhandari&#x2F;Library&#x2F;Developer&#x2F;Xcode&#x2F;DerivedData&#x2F;IIR-bmlukqunvjjciackjnaowbqrozwx&#x2F;Build&#x2F;Products&#x2F;Debug-iphoneos&#x2F;IIR.app

/Users/varunbhandari/Library/Developer/Xcode/DerivedData/IIR-bmlukqunvjjciackjnaowbqrozwx/Build/Products/Debug-iphoneos/IIR.app: Is a directory Command CodeSign failed with a nonzero exit code