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diff --git a/dot-oh-my-zsh/custom/themes/spaceship-prompt/sections/haskell.zsh b/dot-oh-my-zsh/custom/themes/spaceship-prompt/sections/haskell.zsh
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+#
+# Haskell Stack
+#
+# An advanced, purely functional programming language.
+# Link: https://www.haskell.org/
+
+# ------------------------------------------------------------------------------
+# Configuration
+# ------------------------------------------------------------------------------
+
+SPACESHIP_HASKELL_SHOW="${SPACESHIP_HASKELL_SHOW=true}"
+SPACESHIP_HASKELL_PREFIX="${SPACESHIP_HASKELL_PREFIX="$SPACESHIP_PROMPT_DEFAULT_PREFIX"}"
+SPACESHIP_HASKELL_SUFFIX="${SPACESHIP_HASKELL_SUFFIX="$SPACESHIP_PROMPT_DEFAULT_SUFFIX"}"
+SPACESHIP_HASKELL_SYMBOL="${SPACESHIP_HASKELL_SYMBOL="λ "}"
+SPACESHIP_HASKELL_COLOR="${SPACESHIP_HASKELL_COLOR="red"}"
+
+# ------------------------------------------------------------------------------
+# Section
+# ------------------------------------------------------------------------------
+
+# Show current version of Haskell Tool Stack.
+spaceship_haskell() {
+  [[ $SPACESHIP_HASKELL_SHOW == false ]] && return
+
+  # If there are stack files in current directory
+  [[ -f stack.yaml ]] || return
+
+  # The command is stack, so do not change this to haskell.
+  spaceship::exists stack || return
+
+  local haskell_version=$(stack ghc -- --numeric-version --no-install-ghc)
+
+  spaceship::section \
+    "$SPACESHIP_HASKELL_COLOR" \
+    "$SPACESHIP_HASKELL_PREFIX" \
+    "${SPACESHIP_HASKELL_SYMBOL}v${haskell_version}" \
+    "$SPACESHIP_HASKELL_SUFFIX"
+}