diff --git a/.ghc.environment.x86_64-darwin-8.6.3 b/.ghc.environment.x86_64-darwin-8.6.3
deleted file mode 100644
index 0acc61d..0000000
--- a/.ghc.environment.x86_64-darwin-8.6.3
+++ /dev/null
@@ -1,75 +0,0 @@
--- This is a GHC environment file written by cabal. This means you can
--- run ghc or ghci and get the environment of the project as a whole.
--- But you still need to use cabal repl $target to get the environment
--- of specific components (libs, exes, tests etc) because each one can
--- have its own source dirs, cpp flags etc.
--- 
-clear-package-db
-global-package-db
-package-db /Users/Tom/.cabal/store/ghc-8.6.3/package.db
-package-db dist-newstyle/packagedb/ghc-8.6.3
-package-id dagmore-0.1.0.0-inplace
-package-id base-4.12.0.0
-package-id ghc-prim-0.5.3
-package-id rts
-package-id integer-gmp-1.0.2.0
-package-id containers-0.6.0.1
-package-id array-0.5.3.0
-package-id deepseq-1.4.4.0
-package-id mtl-2.2.2
-package-id transformers-0.5.5.0
-package-id template-haskell-2.14.0.0
-package-id ghc-boot-th-8.6.3
-package-id pretty-1.1.3.6
-package-id QckChck-2.12.6.1-2b969f75
-package-id rf-2.0.0.0-046fcda7
-package-id rndm-1.1-4c6c5aad
-package-id time-1.8.0.2
-package-id tf-rndm-0.5-ff66c538
-package-id prmtv-0.6.4.0-698f8111
-package-id sync-2.2.1-f695d776
-package-id hshbl-1.2.7.0-9dac84f8
-package-id bytestring-0.10.8.2
-package-id text-1.2.3.1
-package-id binary-0.8.6.0
-package-id stm-2.5.0.0
-package-id dctst-0.16.0.1-2245b588
-package-id bs-cmpt-0.10.5-ac051413
-package-id unix-2.7.2.2
-package-id cd-pg-0.2-f689c2c5
-package-id directory-1.3.3.0
-package-id filepath-1.4.2.1
-package-id ghc-8.6.3
-package-id ghc-boot-8.6.3
-package-id ghc-heap-8.6.3
-package-id ghci-8.6.3
-package-id hpc-0.6.0.3
-package-id process-1.6.3.0
-package-id terminfo-0.4.1.2
-package-id ghc-pths-0.1.0.9-f43b75a5
-package-id syb-0.7-68e0b2b2
-package-id thr-5.0.1-e5d82a92
-package-id bfnctrs-5.5.3-e3ddce8f
-package-id bs-rphns-0.8-ef6c586f
-package-id cmnd-5.0.4-8551c913
-package-id cntrvrnt-1.5-2e8364aa
-package-id SttVr-1.1.1.1-63deae3e
-package-id dstrbtv-0.6-1cdbc57e
-package-id tggd-0.8.6-20ac6c01
-package-id smgrps-0.18.5-c687433c
-package-id trnsfrmrs-cmpt-0.6.2-f70f38a4
-package-id th-bstrctn-0.2.10.0-9ea02f1a
-package-id prfnctrs-5.3-c534b0f4
-package-id smgrpds-5.3.2-17a2bf58
-package-id nrdrd-cntnrs-0.2.10.0-009aa91a
-package-id hspc-2.7.0-7226d523
-package-id hspc-cr-2.7.0-6d295643
-package-id HUnt-1.6.0.0-0495e08a
-package-id cll-stck-0.1.0-1bdd1342
-package-id ns-trmnl-0.8.2-73b76bcd
-package-id clr-2.3.4-365e027c
-package-id clck-0.7.2-7a84e71f
-package-id hspc-xpcttns-0.8.2-85cd2a08
-package-id qckchck--0.2.0-24c0b9be
-package-id stnv-0.1.1.3-8677160a
-package-id hspc-dscvr-2.7.0-839cae4d
diff --git a/.gitignore b/.gitignore
index 48a004c..697a2c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 dist-newstyle
+.ghc.environment.*