Fix small typos in commands

docs/how-to/build-cardano-sl-and-daedalus-from-source-code.md

@@ -16,7 +16,7 @@ Cardano SL supports two ways for building itself:
 - (preferred) [Nix](https://nixos.org/nix/) package manager (backed by a binary cache by IOHK continuous integration)
 - [Stack](https://haskellstack.org) with Nix for system libraries
 
-In any case, we strongly suggest using [Nix package manager](https://nixos.org/nix/download.html) to get the correct dependencies for building Cardano SL. It will fetch the correct `openssl` version, but won't override the system-installed version. The following commands assume that you already has `stack` and `nix-*` programs.
+In any case, we strongly suggest using [Nix package manager](https://nixos.org/nix/download.html) to get the correct dependencies for building Cardano SL. It will fetch the correct `openssl` version, but won't override the system-installed version. The following commands assume that you already have `stack` and `nix-*` programs.
 
 ### Binaries
 
@@ -120,8 +120,8 @@ After that `daedalus-client-api` will be registered in the local NPM package rep
 Clone Daedalus repository and go to the root directory:
 
  [nix-shell:~/cardano-sl]$ cd
- [nix-shell:~/cardano-sl]$ git clone https:/input-output-hk/daedalus.git
- [nix-shell:~/cardano-sl]$ cd daedalus
+ [nix-shell:~]$ git clone https:/input-output-hk/daedalus.git
+ [nix-shell:~]$ cd daedalus
 
 Then run the following script: