Why do you escape " (double quote) inside an '' (2 single quotes)?

Without I get the following error:

<command-line>:0:86: error: 'mysqld' was not declared in this scope
/tmp/nix-build-akonadi-17.12.1.drv-0/akonadi-17.12.1/src/server/storage/dbconfigmysql.cpp:104:33: note: in expansion of macro 'NIXPKGS_MYSQL_MYSQLD'
     mMysqldPath = QLatin1String(NIXPKGS_MYSQL_MYSQLD);

Builds fine! Thanks 👍

I know this is not the first change that replaces NIX_CFLAGS_COMPILE with CXXFLAGS, but I have not yet seen an explanation why this is the right change. Since when and why did NIX_CFLAGS_COMPILE stop working?

@orivej that is a good question! Maybe we should bissect to find the commit that caused the problem.

I'm doing a git bisect now and hopefully that gives us an answer.

Okay, finished. Git bisect says that the following commit is the first failing: 75d2a7d

After looking at the commit, I assume that the following line could be the problem?
75d2a7d#diff-e846a595b53da93fc388a23603f424d2R17

@adisbladis @ttuegel

sigh I fixed that, and then I rebased, and for some reason Git ate my corrections. This happens practically every time I try to rebase; I probably just don't grok Git. I will open a new PR with the correction.