Fix the build instruction

README.md

@@ -68,25 +68,15 @@ slices in the input.
   - [A bargain for mergesorts (functional pearl) — How to prove your mergesort correct and stable, almost for free](https://arxiv.org/abs/2403.08173) doi:[10.48550/arXiv.2403.08173](https://doi.org/10.48550/arXiv.2403.08173)
 
 ## Building and installation instructions
-
 The easiest way to install the latest released version of Stable sort algorithms in Coq
 is via [OPAM](https://opam.ocaml.org/doc/Install.html):
-
-```shell
-opam repo add coq-released https://coq.inria.fr/opam/released
-opam install coq-stablesort
-```
-
-To instead build and install manually, do:
-
 ``` shell
 git clone https://github.com/pi8027/stablesort.git
 cd stablesort
-make   # or make -j <number-of-cores-on-your-machine> 
-make install
+opam repo add coq-released https://coq.inria.fr/opam/released
+opam install ./coq-stablesort.opam
 ```
 
-
 ## Credits
 The mergesort functions and the stability proofs provided in this library are
 mostly based on ones in the `path` library of Mathematical Components.

meta.yml

@@ -186,6 +186,17 @@ action_appendix: |2-
           env:
             OPAMWITHTEST: true
 
+build: |-
+  ## Building and installation instructions
+  The easiest way to install the latest released version of Stable sort algorithms in Coq
+  is via [OPAM](https://opam.ocaml.org/doc/Install.html):
+  ``` shell
+  git clone https://github.com/pi8027/stablesort.git
+  cd stablesort
+  opam repo add coq-released https://coq.inria.fr/opam/released
+  opam install ./coq-stablesort.opam
+  ```
+
 documentation: |-
   ## Credits
   The mergesort functions and the stability proofs provided in this library are