chore: Disable exactDeps and the HLS check.

Unfortunately, this is required when we use a
`source-repository-package`, as we're about to do for an
as-yet-unreleased version of Selda.

See:
#876

flake.nix

@@ -255,18 +255,22 @@
           # https://github.com/hackworthltd/primer/issues/632
           // (pkgs.lib.optionalAttrs (system == "aarch64-darwin") {
 
+            # We're using `source-repository-package`, so we must
+            # disable this. See:
+            # https://github.com/hackworthltd/primer/issues/876
+
             # Make sure HLS can typecheck our project.
-            check-hls = pkgs.callPackage ./nix/pkgs/check-hls {
-              src = onlyHaskellSrc;
+            # check-hls = pkgs.callPackage ./nix/pkgs/check-hls {
+            #   src = onlyHaskellSrc;
 
-              # Don't use the flake's version here; we only want to run
-              # this HLS check when the Haskell source files have
-              # changed, not on every commit to this repo.
-              version = "1.0";
+            #   # Don't use the flake's version here; we only want to run
+            #   # this HLS check when the Haskell source files have
+            #   # changed, not on every commit to this repo.
+            #   version = "1.0";
 
-              # This is a bit of a hack, but we don't know a better way.
-              inherit (primerFlake) devShell;
-            };
+            #   # This is a bit of a hack, but we don't know a better way.
+            #   inherit (primerFlake) devShell;
+            # };
           })
           // primerFlake.checks;
 
@@ -457,7 +461,10 @@
                 ];
 
                 shell = {
-                  exactDeps = true;
+                  # We're using a `source-repository-package`, so we must disable this.
+                  # See:
+                  # https://github.com/hackworthltd/primer/issues/876
+                  #exactDeps = true;
                   withHoogle = true;
 
                   tools = {