Fixes the xscreensaver-text based screensavers, namely:
Apple ][
Flip Text
Font Glide
GL Text
Nose Guy
Phosphor
Split-Flap
Star Wars
Windup Robot
XMatrix
Symptom of breakage was:
Can't exec "appres": No such file or directory at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 139.
Use of uninitialized value $body in substitution (s///) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 161.
Use of uninitialized value $body in substitution (s///) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 162.
Use of uninitialized value $body in pattern match (m//) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 164.
Use of uninitialized value $body in pattern match (m//) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 168.
Use of uninitialized value $body in pattern match (m//) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 171.
Use of uninitialized value $body in pattern match (m//) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 174.
Use of uninitialized value $body in pattern match (m//) at /nix/store/cm6kipfjrgj17pwdj5si39njzfrrvw8k-xscreensaver-6.08/libexec/xscreensaver/xscreensaver-text line 177.
`lib.recursiveUpdate` indiscriminately recurses into all attribute sets,
also into derivations. This means that it is possible that evaluating a
derivation in the final haskell package set can cause something in
`prev.haskell` to be forced by `recursiveUpdate`, potentially causing an
evaluation error that should not happen.
It can be fixed using a well-crafted predicate for
`lib.recursiveUpdateUntil`, but most robust is just explicitly writing
out the desired merging manually.
