diff --git a/srcpkgs/git-mediate/patches/ghc8.8.3.patch b/srcpkgs/git-mediate/patches/ghc8.8.3.patch
new file mode 100644
index 00000000000..7928b61ef3a
--- /dev/null
+++ b/srcpkgs/git-mediate/patches/ghc8.8.3.patch
@@ -0,0 +1,19 @@
+--- git-mediate.cabal	2001-09-09 03:46:40.000000000 +0200
++++ git-mediate.cabal	2020-03-30 15:32:48.959537620 +0200
+@@ -72,7 +72,7 @@
+   ghc-options:         -O2 -Wall
+   -- other-extensions:
+   build-depends:       base >=4.8 && <5
+-                     , base-compat >= 0.8.2 && < 0.11
++                     , base-compat >= 0.8.2 && < 0.12
+                      , mtl >=2.1
+                      , directory >=1.2
+                      , process >=1.2
+@@ -80,6 +80,6 @@
+                      , unix-compat >=0.4.2.0
+                      , Diff >=0.4
+                      , ansi-terminal >=0.6.2
+-                     , optparse-applicative >=0.11 && <0.15
++                     , optparse-applicative >=0.11 && <0.16
+   hs-source-dirs:      src
+   default-language:    Haskell2010
diff --git a/srcpkgs/git-mediate/template b/srcpkgs/git-mediate/template
index 12890f97e03..5fb8eaa6904 100644
--- a/srcpkgs/git-mediate/template
+++ b/srcpkgs/git-mediate/template
@@ -1,8 +1,9 @@
 # Template file for 'git-mediate'
 pkgname=git-mediate
 version=1.0.8
-revision=2
+revision=3
 build_style=haskell-stack
+stackage="lts-15.4"
 depends="git"
 short_desc="Tool to help resolving git conflicts"
 maintainer="Peter Wang <novalazy@gmail.com>"