I don't mind this as a solution, but also, things really shouldn't break here really, and most if not all the inputs should be in their right places already. I can try rebuilding kdePackages with your patch applied, or we can do it in a staging cycle.

I don't mind this as a solution, but also, things really shouldn't break here really, and most if not all the inputs should be in their right places already. I can try rebuilding kdePackages with your patch applied, or we can do it in a staging cycle.

there are 400 packages and while not all of them break may of them do. i ran 112 of the packages. 41 passed, 71 failed and then i just skipped all of the rest of the kde packages.

[edit] though, looking at the logs 70 of them were failing due to Could NOT find Gettext (missing: GETTEXT_MSGMERGE_EXECUTABLE but there could be other failures beyond that one.

That's very surprising. Were those individual failures or cascading from a single one? Either way, I can look into it later today.

That's very surprising. Were those individual failures or cascading from a single one? Either way, I can look into it later today.

so i think i just built one package at a time and i was overrideing cmake to cmake2 (which was the one with strictDeps fixed) so it shouldn't have been a cascade of failures.

yeah, i hacked one kde package to get access to mkKdeDerivation with cmake overriden. there is probably a better way to do it but looped over all attribs with cmake in nativeBuildInputs and strictDeps set and then just tried to build with the fixed cmake.
eg:

    if [[ ${attr} == kdePackages.* ]]; then
        # hack for kdePackages becase mkKdeDerivation is not an accessible
        # attribute and provides cmake added a passthru for access.
        cmd=(nix-build --no-out-link -E "with import ./.{}; ${attr}.override { mkKdeDerivation = kdePackages.yakuake.passthru.dev.override { cmake = cmake2;}; }")
        # nix-build -E 'with import ./.{}; kdePackages.kdebugsettings.overrideAttrs { strictDeps = false; }'
    else
        cmd=(nix-build --no-out-link -E "with import ./. {}; ${attr}.override { cmake = cmake2; }")
    fi

I've just applied your patch on top of master and am building it now. I'll see what the failures are.

I've just applied your patch on top of master and am building it now. I'll see what the failures are.

these are the other PRs which are fixing packages with strictDeps -- if you're just building everything with the fixed cmake you might need them too:
#324545
#324951

I'm only building kdePackages, but I'll keep that in mind.

here is the failed logs tarball
kdefailed.tar.gz

Fixed everything: #329977