diff --git a/pkgs/shells/fish/oh-my-fish/default.nix b/pkgs/shells/fish/oh-my-fish/default.nix
index 6c09599972d1..0801eb628347 100644
--- a/pkgs/shells/fish/oh-my-fish/default.nix
+++ b/pkgs/shells/fish/oh-my-fish/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 , fish
 , runtimeShell
-, writeShellScript
+, substituteAll
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -11,41 +11,41 @@ stdenv.mkDerivation (finalAttrs: {
   version = "unstable-2022-03-27";
 
   src = fetchFromGitHub {
-    owner = finalAttrs.pname;
-    repo = finalAttrs.pname;
+    owner = "oh-my-fish";
+    repo = "oh-my-fish";
     rev = "d428b723c8c18fef3b2a00b8b8b731177f483ad8";
     hash = "sha256-msItKEPe7uSUpDAfCfdYZjt5NyfM3KtOrLUTO9NGqlg=";
   };
 
-  strictDeps = true;
   buildInputs = [
     fish
   ];
 
+  strictDeps = true;
+
   dontConfigure = true;
   dontBuild = true;
 
   installPhase = ''
     runHook preInstall
 
-    mkdir -pv $out/bin $out/share/${finalAttrs.pname}
-    cp -vr * $out/share/${finalAttrs.pname}
+    mkdir -pv $out/bin $out/share/oh-my-fish
+    cp -vr * $out/share/oh-my-fish
 
-    cat << EOF > $out/bin/omf-install
-    #!${runtimeShell}
+    cp -v ${substituteAll {
+      name = "omf-install";
+      src = ./omf-install;
+      OMF = placeholder "out";
+      inherit fish runtimeShell;
+    }} $out/bin/omf-install
 
-    ${fish}/bin/fish \\
-      $out/share/${finalAttrs.pname}/bin/install \\
-      --noninteractive \\
-      --offline=$out/share/${finalAttrs.pname}
-
-    EOF
     chmod +x $out/bin/omf-install
+    cat $out/bin/omf-install
 
     runHook postInstall
   '';
 
-  meta = with lib; {
+  meta = {
     homepage = "https://github.com/oh-my-fish/oh-my-fish";
     description = "The Fish Shell Framework";
     longDescription = ''
@@ -53,10 +53,10 @@ stdenv.mkDerivation (finalAttrs: {
       which extend or modify the look of your shell. It's fast, extensible and
       easy to use.
     '';
-    license = licenses.mit;
-    maintainers = with maintainers; [ AndersonTorres ];
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ AndersonTorres ];
     mainProgram = "omf-install";
-    platforms = fish.meta.platforms;
+    inherit (fish.meta) platforms;
   };
 })
 # TODO: customize the omf-install script
diff --git a/pkgs/shells/fish/oh-my-fish/omf-install b/pkgs/shells/fish/oh-my-fish/omf-install
new file mode 100644
index 000000000000..0b8be218e38a
--- /dev/null
+++ b/pkgs/shells/fish/oh-my-fish/omf-install
@@ -0,0 +1,6 @@
+#!@runtimeShell@
+
+@fish@/bin/fish \
+    @OMF@/share/oh-my-fish/bin/install \
+    --noninteractive \
+    --offline=@OMF@/share/oh-my-fish