diff --git a/README.md b/README.md
index 1636564..9f1d6c1 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,26 @@ Using the `remotes` package, this is easily installed via:
 ```r
 remotes::install_url("https://git.flavigny.de/christian/hateimparlament/archive/master.zip")
 ```
+Since the fetching and reading is very slow and depends on an internet connection, all vignettes
+use `read_from_csv` to read already parsed tibbles from `.csv` files.
+
+That's why, if you want to build the vignettes yourself, you need to
+download the source code, e.g. on Linux
+```
+git clone https://git.flavigny.de/christian/hateimparlament
+cd hateimparlament
+```
+then start `R` and do
+```r
+devtools::load_all()
+fetch_all(create = TRUE)
+read_all() %>% repair() -> res
+write_to_csv(res, create = TRUE)
+```
+Then finally, do:
+```r
+devtools::install(build_vignettes = TRUE)
+```
 
 # Features
 
diff --git a/vignettes/explicittopic.Rmd b/vignettes/explicittopic.Rmd
index c571164..18f330d 100644
--- a/vignettes/explicittopic.Rmd
+++ b/vignettes/explicittopic.Rmd
@@ -1,8 +1,8 @@
 ---
-title: "explicittopic"
+title: "Analysis of covered topics"
 output: rmarkdown::html_vignette
 vignette: >
-  %\VignetteIndexEntry{explicittopic}
+  %\VignetteIndexEntry{Analysis of covered topics}
   %\VignetteEngine{knitr::rmarkdown}
   %\VignetteEncoding{UTF-8}
 ---
diff --git a/vignettes/generalquestions.Rmd b/vignettes/generalquestions.Rmd
index a2b05fc..09164f8 100644
--- a/vignettes/generalquestions.Rmd
+++ b/vignettes/generalquestions.Rmd
@@ -1,8 +1,8 @@
 ---
-title: "generalquestions"
+title: "General questions"
 output: rmarkdown::html_vignette
 vignette: >
-  %\VignetteIndexEntry{generalquestions}
+  %\VignetteIndexEntry{General questions}
   %\VignetteEngine{knitr::rmarkdown}
   %\VignetteEncoding{UTF-8}
 ---
diff --git a/vignettes/interaction.Rmd b/vignettes/interaction.Rmd
index 99bbfa5..2b60ddf 100644
--- a/vignettes/interaction.Rmd
+++ b/vignettes/interaction.Rmd
@@ -1,8 +1,8 @@
 ---
-title: "interaction"
+title: "Interaction between fractions"
 output: rmarkdown::html_vignette
 vignette: >
-  %\VignetteIndexEntry{interaction}
+  %\VignetteIndexEntry{Interaction between fractions}
   %\VignetteEngine{knitr::rmarkdown}
   %\VignetteEncoding{UTF-8}
 ---