The Go package `example.com/vf328` has no files this build can compile.

The Go package example.com/vf328 has no files this build can compile. That is almost always because it needs cgo (a C compiler and the C library it wraps), and this build compiles without it. The full output is in the deploy log.

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What the log looks like

Deploy log
ERROR: Unable to lock database: Permission deniedERROR: Failed to open apk database: Permission deniedpackage example.com/<account>: build constraints exclude all Go files in /app

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