diff --git a/R/appendix.R b/R/appendix.R
index 946a007a..ac352f6a 100644
--- a/R/appendix.R
+++ b/R/appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
@@ -15,7 +16,8 @@ insert_source <- function(repo_spec, name,
                           collection = "posts",
                           branch = "main",
                           host = "https://github.com",
-                          text = "source code") {
+                          text = "Source",
+                          file_name) {
   path <- paste(
     host,
     repo_spec,
@@ -23,7 +25,7 @@ insert_source <- function(repo_spec, name,
     branch,
     collection,
     name,
-    "index.qmd",
+    file_name,
     sep = "/"
   )
   return(markdown_link(text, path))
@@ -39,17 +41,9 @@ insert_lockfile <- function(repo_spec, name,
                             collection = "posts",
                             branch = "main",
                             host = "https://github.com",
-                            text = "R environment") {
-  path <- paste(
-    host,
-    repo_spec,
-    "tree",
-    branch,
-    collection,
-    name,
-    "renv.lock",
-    sep = "/"
-  )
+                            text = "Session info") {
+  path <- path <- "https://pharmaverse.github.io/blog/session_info.html"
+
   return(markdown_link(text, path))
 }
 
@@ -57,7 +51,7 @@ insert_lockfile <- function(repo_spec, name,
 
 # top level function ------------------------------------------------------
 
-insert_appendix <- function(repo_spec, name, collection = "posts") {
+insert_appendix <- function(repo_spec, name, collection = "posts", file_name) {
   appendices <- paste(
     markdown_appendix(
       name = "Last updated",
@@ -67,7 +61,8 @@ insert_appendix <- function(repo_spec, name, collection = "posts") {
     markdown_appendix(
       name = "Details",
       content = paste(
-        insert_source(repo_spec, name, collection),
+        insert_source(repo_spec, name, collection, file_name = file_name),
+        # get renv information,
         insert_lockfile(repo_spec, name, collection),
         sep = ", "
       )
diff --git a/posts/2024-02-13_teal_on_cran/appendix.R b/posts/2024-02-13_teal_on_cran/appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-02-13_teal_on_cran/appendix.R
+++ b/posts/2024-02-13_teal_on_cran/appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
diff --git a/posts/2024-02-14_iscr_conference/appendix.R b/posts/2024-02-14_iscr_conference/appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-02-14_iscr_conference/appendix.R
+++ b/posts/2024-02-14_iscr_conference/appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
diff --git a/posts/2024-03-04_inside_the__phar.../appendix.R b/posts/2024-03-04_inside_the__phar.../appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-03-04_inside_the__phar.../appendix.R
+++ b/posts/2024-03-04_inside_the__phar.../appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
diff --git a/posts/2024-03-11_tips_for__first_.../appendix.R b/posts/2024-03-11_tips_for__first_.../appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-03-11_tips_for__first_.../appendix.R
+++ b/posts/2024-03-11_tips_for__first_.../appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
diff --git a/posts/2024-04-15_de-_mystifying__.../appendix.R b/posts/2024-04-15_de-_mystifying__.../appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-04-15_de-_mystifying__.../appendix.R
+++ b/posts/2024-04-15_de-_mystifying__.../appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {
diff --git a/posts/2024-04-29_appsilon_and__sa.../appendix.R b/posts/2024-04-29_appsilon_and__sa.../appendix.R
index e7c62aaa..ac352f6a 100644
--- a/posts/2024-04-29_appsilon_and__sa.../appendix.R
+++ b/posts/2024-04-29_appsilon_and__sa.../appendix.R
@@ -1,3 +1,4 @@
+library(dplyr)
 # markdown helpers --------------------------------------------------------
 
 markdown_appendix <- function(name, content) {