diff --git a/README.md b/README.md
index 1312fd8..e3dda3b 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,10 @@
 ![infinite spheres](renders/spheres.png)
 
 ## Compiling:
-
+in fish:
 ```fish
 # load requirements
-nix-shell
+nix-shell --run fish
 # run gcc with flags
 gcc (pkg-config --cflags --libs gtk+-3.0 | string split " ") -lm -Wall -Wextra -o march.out main.c
 ```
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