Allow upgrade of Cabal-syntax and parsec

Author: phadej

.github/workflows/haskell-ci.yml

@@ -225,7 +225,7 @@ jobs:
           package bytestring
             tests: False
           EOF
-          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(Cabal|cabal-install-parsers|haskell-ci)$/; }' >> cabal.project.local
+          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(Cabal|Cabal-syntax|cabal-install-parsers|haskell-ci|parsec)$/; }' >> cabal.project.local
           cat cabal.project
           cat cabal.project.local
       - name: dump install plan

cabal.haskell-ci

@@ -46,7 +46,7 @@ haddock: True
 
 -- By default `installed` constraints are used for packages
 -- in global db. We can modify which constraints are used.
-installed: +all -Cabal
+installed: +all -Cabal -Cabal-syntax -parsec
 
 -- Options for local packages
 local-ghc-options: -Werror

haskell-ci.sh

@@ -493,7 +493,7 @@ keep-going: False
 package bytestring
   tests: False
 EOF
-$HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(Cabal|cabal-install-parsers|haskell-ci)$/; }' >> cabal.project.local
+$HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(Cabal|Cabal-syntax|cabal-install-parsers|haskell-ci|parsec)$/; }' >> cabal.project.local
 run_cmd cat cabal.project
 run_cmd cat cabal.project.local