Can One Use Environment Variables In Inno Setup Scripts?
Answer : I ran into the same problem when trying to specify the source location of files in the [Files] section. I used the GetEnv function to define a new constant. #define Qt5 GetEnv('QT5') [Files] Source: {#Qt5}\bin\Qt5Concurrent.dll; DestDir: {app}; According to this page in the Inno Setup documentation, the value of environment variables can be retrieved using the following syntax: {%name|default} On install-time If you need to resolve the variable on the target machine, while installing, you can use the {%NAME|DefaultValue} "constant". [Files] Source: "MyApp.dat"; Dest: "{%MYAPP_DATA_PATH|{app}}" If you need to resolve the variable on the target machine in Pascal Script code, you can use GetEnv support function. Path := GetEnv('MYAPP_DATA_PATH'); On compile-time If you need to resolve the variable on the source machine, while compiling the installer, you can use GetEnv preprocessor function: [Files] Sourc...