diff --git a/src/server.jl b/src/server.jl
index 0c20f50..a84e687 100644
--- a/src/server.jl
+++ b/src/server.jl
@@ -184,7 +184,7 @@ function raw_markdown_chunks(path::String)
             )
         end
 
-        frontmatter = _recursive_merge(CommonMark.frontmatter(ast), default_frontmatter())
+        frontmatter = _recursive_merge(default_frontmatter(), CommonMark.frontmatter(ast))
 
         return raw_chunks, frontmatter
     else
diff --git a/src/worker.jl b/src/worker.jl
index 3ef71d3..ff09032 100644
--- a/src/worker.jl
+++ b/src/worker.jl
@@ -69,8 +69,10 @@ function worker_init(f::File)
             # Rerun the package loading hooks if the frontmatter has changed.
             if FRONTMATTER[] != frontmatter
                 FRONTMATTER[] = frontmatter
-                for hook in values(PACKAGE_LOADING_HOOKS)
-                    hook()
+                for (pkgid, hook) in PACKAGE_LOADING_HOOKS
+                    if haskey(Base.loaded_modules, pkgid)
+                        hook()
+                    end
                 end
             else
                 FRONTMATTER[] = frontmatter
@@ -291,12 +293,20 @@ function worker_init(f::File)
             return (; fig_width, fig_height, fig_format, fig_dpi)
         end
 
+        const PKG_VERSIONS = Dict{Base.PkgId,VersionNumber}()
         function _pkg_version(pkgid::Base.PkgId)
-            deps = Pkg.dependencies()
-            if haskey(deps, pkgid.uuid)
-                return deps[pkgid.uuid].version
+            # Cache the package versions since once a version of a package is
+            # loaded we don't really support loading a different version of it,
+            # so we can just cache the version number.
+            if haskey(PKG_VERSIONS, pkgid)
+                return PKG_VERSIONS[pkgid]
             else
-                return nothing
+                deps = Pkg.dependencies()
+                if haskey(deps, pkgid.uuid)
+                    return PKG_VERSIONS[pkgid] = deps[pkgid.uuid].version
+                else
+                    return nothing
+                end
             end
         end
 
@@ -344,8 +354,8 @@ function worker_init(f::File)
                         mod = get(Base.loaded_modules, pkgid, nothing)
                         try
                             Base.@invokelatest f(pkgid, mod)
-                        catch
-                            @error "hook failed" pkgid mod
+                        catch error
+                            @error "hook failed" pkgid mod error
                         end
                         return nothing
                     end
diff --git a/test/examples/integrations/CairoMakie.qmd b/test/examples/integrations/CairoMakie.qmd
index 4b12571..07f3955 100644
--- a/test/examples/integrations/CairoMakie.qmd
+++ b/test/examples/integrations/CairoMakie.qmd
@@ -1,5 +1,7 @@
 ---
 title: CairoMakie integration
+fig-width: 4
+fig-height: 3
 ---
 
 ```{julia}
diff --git a/test/runtests.jl b/test/runtests.jl
index cb709ef..d39b3b3 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -831,4 +831,35 @@ end
             end
         end
     end
+
+    @testset "package integration hooks" begin
+        env_dir = joinpath(@__DIR__, "examples/integrations/CairoMakie")
+        content = read(joinpath(@__DIR__, "examples/integrations/CairoMakie.qmd"), String)
+        mktempdir() do dir
+            cd(dir) do
+                server = QuartoNotebookRunner.Server()
+
+                cp(env_dir, joinpath(dir, "CairoMakie"))
+                write("CairoMakie.qmd", content)
+
+                json = QuartoNotebookRunner.run!(server, "CairoMakie.qmd")
+
+                image_png = json.cells[end].outputs[1].metadata["image/png"]
+                @test image_png.width == 768
+                @test image_png.height == 576
+
+                content = replace(content, "fig-width: 4" => "fig-width: 8")
+                content = replace(content, "fig-height: 3" => "fig-height: 6")
+                write("CairoMakie.qmd", content)
+
+                json = QuartoNotebookRunner.run!(server, "CairoMakie.qmd")
+
+                image_png = json.cells[end].outputs[1].metadata["image/png"]
+                @test image_png.width == 1536
+                @test image_png.height == 1152
+
+                close!(server)
+            end
+        end
+    end
 end