To create a package, you compile a source file that has a .dpk extension. The base name of the .dpk file becomes the base name of the files generated by the compiler. For example, if you compile a package source file called traypak.dpk, the compiler creates a package called traypak.bpl.

<PROJECT value="Traypak.bpl"/>

A successfully compiled package includes .dcp, .dcu and bpl files. For a detailed description of these files, see Packages and standard DLLs. 

These files are generated by default in the directories specified in Library page of the ToolsOptionsEnvironment OptionsDelphi OptionsLibrary dialog. You can override the default settings by right-clicking the package in the Project Manager and choosing Options to display the Project Options dialog; make any changes on the Directories/Conditionals page.