diff --git a/pkgs/by-name/oh/oh-my-fish/omf-install b/pkgs/by-name/oh/oh-my-fish/omf-install
index 0b8be218e38a..36cc440e13a0 100644
--- a/pkgs/by-name/oh/oh-my-fish/omf-install
+++ b/pkgs/by-name/oh/oh-my-fish/omf-install
@@ -1,6 +1,6 @@
 #!@runtimeShell@
 
 @fish@/bin/fish \
-    @OMF@/share/oh-my-fish/bin/install \
+    @omf@/share/oh-my-fish/bin/install \
     --noninteractive \
-    --offline=@OMF@/share/oh-my-fish
+    --offline=@omf@/share/oh-my-fish
diff --git a/pkgs/by-name/oh/oh-my-fish/package.nix b/pkgs/by-name/oh/oh-my-fish/package.nix
index d18465609d91..019979bf9f39 100644
--- a/pkgs/by-name/oh/oh-my-fish/package.nix
+++ b/pkgs/by-name/oh/oh-my-fish/package.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation (finalAttrs: {
     cp -v ${substituteAll {
       name = "omf-install";
       src = ./omf-install;
-      OMF = placeholder "out";
+      omf = placeholder "out";
       inherit fish runtimeShell;
     }} $out/bin/omf-install