With structuredAttrs support in 1bcca7d66b
this broke, because the following line turns qmakeFlags from a string
into an array:
qmakeFlags+=(...)
It will then be handled slightly different when it's an array, so that
all the xxx_INSTALL_PATH variables are passed as a *single* argument,
which breaks the build.
Resolves#342087
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
